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📄 Interior Layout & eBook Conversion

Book Formatting Services Print-Ready PDF. Clean EPUB. Every Platform Covered.

What formatting does: Professional interior formatting converts your manuscript into a print-ready PDF that Amazon KDP and IngramSpark accept without rejection, and a clean EPUB that displays correctly on every eReader. It eliminates the spacing errors, font substitutions, rogue page numbers and margin failures that a direct Word upload produces. Every file we deliver is preflighted against current platform specifications before it leaves our hands.
✓ Print PDF (KDP + IngramSpark) ✓ EPUB + Kindle files ✓ Fixed-layout for illustrated books ✓ Preflight report included

What Professional Formatting Produces Every Deliverable Explained

Print Interior PDF

A print-ready PDF sized to your chosen trim size (5x8, 5.5x8.5, 6x9 or custom). Correct gutter margins for binding, embedded fonts, proper chapter openings, suppressed headers on opening pages, page numbers positioned correctly, and a full preflight check confirming the file meets KDP and IngramSpark upload specifications. This is the file that produces a physically perfect printed book.

  • Trim size correct for your chosen format
  • Gutter margin calculated for page count
  • Fonts embedded, not substituted
  • Chapter openings on right-hand pages
  • KDP + IngramSpark preflight passed

Reflowable EPUB

A clean EPUB 3 file where text, headings and images reflow correctly across every screen size and eReader. Compatible with Apple Books, Kobo, Barnes and Noble Nook, Google Play Books and all major platforms. Tested across multiple devices before delivery. No broken headings, no font overrides, no image sizing errors.

  • EPUB 3 specification compliant
  • Tested on Kindle, Apple Books, Kobo
  • Chapter navigation built in
  • Images correctly sized and linked
  • Metadata embedded (title, author, ISBN)

Kindle File

A Kindle-specific file (MOBI or KPF) for Amazon's ecosystem. Amazon's own KDP conversion from EPUB sometimes produces formatting errors. We produce a native Kindle file that renders correctly in the Kindle app across iPhone, Android, Kindle device and Kindle Cloud Reader. Tested on each before delivery.

  • Native Kindle format (not auto-converted)
  • Tested on Kindle app and device
  • Table of contents linked correctly
  • Drop caps and styling preserved
  • KDP upload-ready

Fixed-Layout EPUB (Illustrated Books)

For children's picture books and illustrated titles where the precise position of images relative to text must be maintained at every screen size. Fixed-layout EPUB is technically distinct from reflowable EPUB and significantly more complex to produce. Pages are built individually with pixel-precise placement. Required for KDP and IngramSpark illustrated book distribution.

  • Page-by-page fixed layout
  • Spread pages handled correctly
  • Text overlaid on illustrations
  • Tested on iPad, Kindle Fire, tablets
  • IngramSpark fixed-layout spec compliant

Trim Sizes We Format Every Standard Self-Publishing Format Covered

Most Popular
6 × 9″

Non-Fiction Standard

Business books, self-help, memoir, personal development. The standard trim for most non-fiction titles. Good page density at typical word counts.

Best for: 40,000–100,000 words
5.5 × 8.5″

Memoir & Narrative

Personal narrative, memoir, creative non-fiction. Slightly smaller than 6x9, creates a more intimate reading experience. Common for literary non-fiction.

Best for: 50,000–90,000 words
5 × 8″

Fiction Standard

Novels, novellas, short story collections. The classic fiction trim size. Produces a book that looks and feels like a traditionally published novel at retail.

Best for: 60,000–120,000 words
8.5 × 8.5″

Children's Square

Picture books and illustrated children titles. Square format maximises illustration space and displays well on Amazon thumbnails and retail shelves.

Best for: illustrated picture books
8.5 × 11″

Large Format

Workbooks, journals, activity books, coffee table books and titles with significant visual content or wide tables. Full US letter size.

Best for: workbooks, guides, activity books
Custom

Non-Standard

Any trim size supported by KDP or IngramSpark. We format to any custom dimensions with correct margin calculations for the chosen binding type and page count.

Request during consultation

What a Word Upload Gets Wrong And What Professional Formatting Fixes

Inconsistent paragraph spacing

Word documents carry hidden spacing rules that differ by paragraph style. A direct upload produces random gaps between paragraphs throughout the book that the author never sees until the proof copy arrives.

Uniform typeset spacing

Every paragraph, heading and section break is set to an explicit baseline grid. No paragraph in the finished book has different spacing from any other of the same type.

Wrong margins for binding

KDP calculates spine width from page count. If the inner gutter margin is not adjusted for the specific page count, text runs too close to the spine and becomes difficult to read in the bound copy.

Calculated gutter margins

Gutter margins are set precisely from the final page count using KDP and IngramSpark margin tables. The inner margin is never less than what the platform requires for that page count.

Page numbers on wrong pages

A common Word export error places page numbers on chapter opening pages, blank pages and the title page. In a finished book this looks amateurish and is immediately visible to any reader.

Correctly suppressed folios

Page numbers are suppressed on chapter opening pages, blank pages and all front matter pages as per book industry standard. Running headers are correctly absent where convention requires.

Font substitution on upload

If fonts are not embedded in the PDF before upload, KDP substitutes them with system defaults. The book is published in a different typeface from the one the author chose, permanently.

Fonts fully embedded

Every font used in the interior is embedded in the PDF before delivery. What you see in the proof is exactly what every copy of the book prints as, permanently and without substitution.

Frequently Asked Questions About Book Formatting

Professional book formatting produces the interior layout files that distribution platforms require. For print: a PDF with correct trim size margins, gutter allowance, embedded fonts, proper headers and footers, chapter openings and a full preflight check. For eBooks: a clean reflowable EPUB that displays correctly on every screen, plus a Kindle-compatible file. All files are tested before delivery.
KDP accepts Word documents but the output is lower quality than a professionally formatted PDF. Common problems include inconsistent paragraph spacing, incorrect margins for the trim size, page numbers on chapter opening pages, headers appearing where they should not, and font substitution. A professionally formatted PDF gives KDP a print-ready file requiring no automated conversion.
The most common trim sizes are: 6x9 inches for non-fiction and business books, 5.5x8.5 for memoirs and narrative non-fiction, 5x8 for fiction, and 8.5x8.5 for illustrated children books. The trim size affects page count, spine width and cover file dimensions. We advise on the best trim size for your specific genre and word count during the consultation.
A reflowable EPUB adjusts to any screen size and is standard for novels and most non-fiction. A fixed-layout EPUB preserves an exact page design at a fixed size, required for children picture books and illustrated titles where the precise relationship between images and text must be maintained. Fixed-layout EPUBs are more complex and take longer to produce correctly.
A standard trade paperback interior with no complex elements typically takes 5 to 10 business days. Books with tables, charts, footnotes or images within text take longer. Fixed-layout children book formatting takes 10 to 15 business days. Rush timelines are available on request.
Yes. We produce the print PDF and EPUB simultaneously from the same master file. This ensures consistency between print and digital editions and is more efficient than formatting them separately. Both files are delivered together with a preflight report confirming they meet KDP and IngramSpark specifications.
For print: a print-ready PDF sized to your chosen trim size, preflighted for both KDP and IngramSpark. For eBooks: an EPUB 3 file compatible with all major platforms, plus a Kindle-specific file for Amazon. For illustrated books: a fixed-layout EPUB in addition to the print PDF.
Yes. Interior formatting for both print and eBook is included as standard in every Columbia Publication full publishing package. Authors who need standalone formatting only can request a quote. Pricing depends on book length, complexity and format requirements.

Ready for a Professionally Formatted Book? Get a Free Quote.

A free consultation covers your manuscript, trim size requirements and a transparent flat-fee quote for print PDF, EPUB and Kindle files — preflighted and platform-ready.

+1 (703) 997-9787 Call a publishing specialist directly
✓ Print-Ready PDF ✓ EPUB + Kindle ✓ Preflight Included ✓ Platform Rejection-Free
Columbia Publication — 1550 Wilson Blvd, Arlington, VA 22209, USA — support@columbiapublication.com