Coming from web design industry, I was used to the term UX (User Experience). The term can be applied to both print and digital format books. If you are an author, here are a few tips so help improve your fans’ reading experience.
1. Proper grammatical structure: A good book is a summation of good knowledge combined with good way of delivering it. Often I have found good books get unfair 1 or 2 star rating on Amazon due to typos or poor grammatical structure that could have been avoided had the author hired a professional editor.
From personal stand point, if my reading enjoyment is not derailed by noticing a grammatical mistake, I continue to enjoy a book. If a typo happens to catch people’s attention, it feels like the crunchy feeling you get if there happens to be a part of egg shell left in a yummy omelet.
2. Add some flair to the chapter page: space, fancy font style for the first letter of the word, even a nice visual treat. All set a stage for readers’ imagination to soar.
3. Justification: it looks better to the eye.
4. Table of content: should contain all chapters, including back and end content.
5. Uniformity of fonts styles, size and space between paragraphs. Do not use too many font styles ad sizes.
6. Quotations should be separated form the main text by: font style, size, italicizing and or changing page margins, usually wider than the main text’s.