Every weight-loss book out in the world today sells a slightly different method to get the same result: shedding unwanted weight. If you’ve written a weight-loss manual, you’d better hope its book titles and subtitles are distinct enough to stand out.

When author Grace Smith wrote a book about the unusual weight-loss tactic of hypnosis, she used PickFu to decide what title to run with. She created a poll targeted at people between the ages of 25 and 54. Then, she asked this audience to tell her which title caught their interest.

When it comes to selling books, the littlest details can make the biggest difference. One author of a middle-grade book (read: for kids ages 8-12) recently ran a PickFu poll that asked the simple yet critical question, “Which book would you buy?”

At first glance, the covers look exactly the same, but one cover won by a significant number of votes. Obviously, there’s a big difference between the two. Let’s see if we can find the graphic design secrets behind the winner.

Book cover designers have one of the trickiest jobs in the industry. They have to create covers that attract the largest possible number of potential customers. This is especially important when the book has no thrilling title to help make it pop. So what’s important when choosing a book cover?

One creator of a woodland creature-themed baby guest book recently took five cover designs to PickFu and created a poll to find out which one stood out above the rest. The creator asked 50 women to rank their favorite options:

A book description often decides whether someone buys a book or puts it back on the shelf. This means that it’s crucial for authors to test their book descriptions, which is easy to do using PickFu.

Recently, one author split-tested two book descriptions by asking respondents, “Which book description sounds more appealing?”

Option A switches uneasily between tenses and sounds somewhat distant, but it’s short and easy for the eye to digest.

Option B begins with a more urgent first line, but it’s longer.

Can you guess which one won?

Say you’re a writer of religious self-help books, but you want your book to appeal to everyone. Do you design your title and cover with religion in mind or the general audience who’ll be reading it (hopefully)?

Author Michael Peters created a PickFu poll to answer that question for his own religious self-help book.

Option A’s title is a bit of a mouthful: Lost in Detroit: Bent Nails, Alien Life, and Jesus of Nazareth: The Journey to the Non-Religious Jesus. The cover features a clean black, white, and turquoise color scheme with the Detroit skyline below the title.

Option B’s title is much shorter: Tired of Religion? Come & See Jesus of Nazareth. The cover art is a blurred painting of Jesus.

Can you guess which one won?