What Makes a Book More Readable?

What Makes a Book More Readable?

When authors think about book design, the first thing that pops into their minds is usually the cover. Cover design is incredibly important — but book layout is arguably just as important! After all, your cover may attract readers’ initial interest, but your interior design needs to maintain it.

Whether you plan to hire a book layout designer or typeset the whole thing yourself, it’s crucial to know the basics of interior design so you can ensure a quality final result.

Now let’s make sure you have a solid grasp of the three key elements of book layout: alignment, margins, and trim size.

  1. Alignment

Any book with a substantial amount of text (which is to say, most of them) relies on carefully considered alignment. You might be thinking: “Okay, I’ll line up the text. How hard can it be?” Well, harder than you think. Professional alignment means that both spacing and grids must be flawlessly adjusted to the needs of your book.


For alignment to be done well, your lines need to have consistent vertical spacing, as well as be spaced so they’re all roughly the same length (or “justified”). Don’t rush into automatic word processor justification, though, or you may end up with some really awkward-looking stuff. Instead, use specialized book design software that hyphenates some words for subtler justification, or hire a layout designer to manually adjust the text.


You’ll also need a consistent grid, which means making sure the text lines up horizontally from page to page. This may be tricky if you’re printing physical copies of your book, as print companies sometimes skew the grid even if you’ve sent them a flawlessly aligned file. So if you’re printing on demand, make sure to order a test copy before mass-printing your book.

  1. Margins

In order to maintain a standard line length for your margins, you’ll need to determine how wide they should be. (Also keep in mind that “margins” aren’t just the space on either side of your text, but above and below as well!)

Luckily, there’s a clear-cut answer to this question. For a standard-sized book, your outer (or “rag”), top, and bottom margins should all be about 0.5 inches each, while your inner or “gutter” margins should be 0.75-0.9 inches. This ensures that your text isn’t swallowed up when the pages are bound, and that all your margins ultimately appear about half an inch wide — just enough space for someone to hold a physical copy of your book open.

When formatting your text for ebook distribution, your gutter margins can (and should) be thinner! The standard for ebooks seems to be about 0.5 inches all around. Most ebook formatting tools will calibrate this automatically, but it’s still worth checking before you upload.

  1. Trim size

We’ll squeeze in just one more technical element — this only applies to those of you printing books, so if you’re going digital, feel free to skip ahead! Basically, you want to make sure that your trim size complements the length of your book.

The vast majority of print books are one of the following:

Digest (5.5” x 8.5”)

US trade (6” x 9”)

How do you choose? Simply consider how many words your book is — your goal is to produce a book that’s neither too thick nor too skinny. So to get the perfect goldilocks book, go for the trade format if your book is over 125,000 words, and choose digest for books under 100,000 words.

If your book is between 100,000-125,000 words, it’s really up to you! Either trim size will look reasonable; your only other consideration may be whether you’d prefer hardcover or paperback copies. (For hardcover, the larger trim will be better.)

This literary mystery novel is less than 100,000 words long, and as such benefits from a smaller trim size.

Zooming in: interior design details

Let’s zero in on some of the details that will make your book flow. Though you might think of certain design details as more distracting than engaging, a good designer knows that honing such details is key to a smooth reading experience!

In constructing your own book’s interior, pay close attention to:


Typography encompasses both typefaces (e.g. Times New Roman, Garamond, etc.) and font styling (bold, italics, font size, etc.). Typography is genre-dependent, so you may want to research other books in your genre as you refine yours.

Running heads and feet

These are formatted lines at the top and bottom of each page, containing information like the chapter title (at the top) and page numbers (at the bottom). Keep the font size small and make sure they’re either centered or aligned with your rag margins.

Ornamental scene breaks

You may have specially designed ornamental breaks, you may want to use dots or dashes, or you can disregard them altogether and just add extra white space.

Line spacing

Again, be sure to align your text evenly, and try to avoid widows and orphans (isolated lines in the body of your text).

White space

White space can be used in many ways — and can easily tip into bad design.

For text-only books, white space is mostly rags and gutters, the margins on either side of your text. As mentioned, when typesetting, make sure these are measured properly; you don’t want massive margins constricting your text. Also mind the space around chapter headings! Each chapter should begin with a “sink” that takes up roughly one-third of the page, with plenty of white space to pillow the chapter title.

When it comes to books with images, white space is used in more diverse ways. The crucial thing here is to ensure sufficient visual breathing space between text and images. Resist the temptation to cram as many elements as possible onto a single page — it won’t look dynamic, it’ll just look busy. Remember that white space is your friend.

Art and images

Though you’ll want to adhere to convention in terms of technical aspects like alignment and margins, you can still experiment with header type, images, and other visual elements in your book.

As with white space, design-heavy books present more opportunities for innovation. You can even add a few illustrations, as long as they don’t feel too jarring! Black-and-white, minimalist illustrations usually do the trick in an all-text book.

Book templates for a flawless book layout

As you can see, each template comes with its own distinct flourishes, with Romance being the most ornate of the three to suit genre conventions.

You may also notice that each sample here contains the same opening text, but the words align differently in each to fit the needs of the page.

Finally, if your book does pose some design challenges, you may want to hire a professional for this task — you’re mere clicks away from finding the perfect layout designer for you! We hope these tips have helped you gain insight into the world of interior book design, and wish you the best of luck.


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