The BookDigits rating system is unlike anything else on the web, which means there's a bit of a learning curve. But don't worry, you'll pick it up very quickly!
A full rating is comprised of several elements, and this quick tutorial will help you get familiar with each one.
BookDigits supports two grading scales: the letter scale from A+ (high) to F (low), and the numeric scale from 5 (high) to 1 (low). You can switch between the two scales at any time.
L/E Ratio
Some books are meant to be read as literary works of art, and some are intended to be pure commercial entertainment. A lot of books fall in between, and that's what the L/E Ratio measures. Neither side of the spectrum is better than the other. The purpose of the L/E ratio is to help you identify the style of books you enjoy reading. Try out the L/E Ratio slider below.

Traditional genres such as sci-fi, romance, and fantasy are too broad and vague to be useful. BookDigits uses theme tags instead. You can choose up to 10 tags per book and set a percentage for each one. For example, a book traditionally categorized as sci-fi could be 50% aliens, 30% military, and 20% love. Try to keep tags short but descriptive.
Writing Quality
How skilled was the author's writing style and use of language? Keep in mind that the Writing Quality score you choose does not have to affect the overall grade you give a book. Try out the Writing Quality slider below.
Low Medium High
How inventive was the book's subject material and style? When choosing the Originality score, take into account the time period in which the book was first published. Try out the Originality slider below.
Low Medium High
How hard was the book to put down? Remember that bad books can be addictive, and good ones don't have to be. Try out the Addictiveness slider below.
Low Medium High
Movie Potential
How well would the book translate to a film? If the book has already been turned into a movie, score it on how much you thought it deserved to get a film adaptation – not on how well the movie actually came out. Try out the Movie Potential slider below.
Low Medium High
The re-readability metric asks a simple question: how eager are you to read the book again? Try out the Re-readability slider below.
Low Medium High
Sequel Potential
How interested would you be in reading a sequel of the book? If the book already has a sequel, score it on whether the sequel was deserved or not. Try out the Sequel Potential slider below.
Low Medium High
You have 500 characters to summarize your opinion of the book. Don't waste it on summarizing the plot. Tell the world how you really feel. (Including a comment is optional.)