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Trim sizes, paper sizes, spine widths, cover templates, ISBN tools, fonts and a directory of publishers, awards and literary magazines — 10,100+ reference pages built from open data and careful book math.

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Today · November 5

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On this day

1499 — The Catholicon, written in 1464 by Jehan Lagadeuc in Tréguier, is published; this is the first Breton dictionary as well as the first French dictionary.

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Trending on Open Library

  1. Atomic Habits James Clear
  2. The 48 Laws of Power Robert Greene
  3. Rich Dad, Poor Dad Robert T. Kiyosaki
  4. How to Win Friends and Influence People Dale Carnegie
  5. The Hunger Games Suzanne Collins
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Poem of the day

Lines Written from Home

Though bleak these woods, and damp the ground
With fallen leaves so thickly strown,
And cold the wind that wanders round
With wild and melancholy moan;
…

Read the poem by Anne Bronte →

Term of the day · Printing & prepress

Rich black

A black built from black ink plus some cyan, magenta and yellow for a deeper tone on large areas, e.g. C60 M40 Y40 K100. Never use rich black for small body text — tiny…

Latest update: 41 poems; 20 cover art; 9 popular books; 6 audiobooks; 1 new books.

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35 pages Trim sizes Every paperback and hardcover size with margins, page counts and platform availability. 871 pages Spine width & covers Cover dimensions for 12 trims and 66 page counts, with templates. 357 pages Word count to pages How long your manuscript will be in print, at any trim and font size. 285 pages Paper sizes ISO, US, JIS, envelopes, photo, poster and historic sizes in every unit. 1,715 pages Free fonts for books Open-source fonts with book-page specimens and pairing ideas. 1,342 pages Publishers Publishing houses, university presses and imprints worldwide. 781 pages Literary awards Book prizes with organisers, prize money and recent winners. 294 pages Literary magazines Journals and reviews for short fiction, poetry and essays. 825 pages Public-domain classics Word counts and print-length estimates for the most-read free books. 298 pages ISBN groups Every ISBN registration group and its publisher ranges. 49 pages Book anatomy & binding Front matter order, binding methods and how they compare. 20 pages Imposition & signatures Folding schemes and booklet page orders with diagrams. 72 pages Paper weight & stocks GSM and pound conversions, thickness and paper types. 59 pages Genres & book length Expected word counts and trims for every major category. 172 pages Glossary Printing, binding, typography and publishing terms explained. 426 pages Classic typefaces Garamond, Baskerville, Caslon and the history of type. 367 pages On this day Writers born and died, and literary events, for every date. Updated daily Trending today The books readers are looking for right now on Open Library. 709 pages Public-domain poems Full texts of classic poems with forms and typesetting notes. 305 pages Free audiobooks LibriVox recordings with running times and print lengths. 124 pages Nobel laureates Every Nobel Prize in Literature with the official motivation. 575 pages New books This year's novels and nonfiction with Wikipedia articles. 113 pages Popular books Page counts and reading times of books readers track now. 278 pages Free cover art Public-domain paintings (CC0) for book covers.

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About this site

Leaf & Spine is an independent, free reference for people who make books. The numbers come from published printer specifications and transparent formulas — see how we calculate — and the directories are compiled from open data sources credited on every page.