I'm a big fan of the Regency period in England and am currently reading Jane Austen's Guide to Good Manners: Compliments, Charades and Horrible Blunders. It's a short and informative book tinged with humor and contains examples from the works of Jane Austen. It also has some very nice illustrations.
I just finished J.R. Ward's Lover Avenged. I became addicted to the Black Dagger Brotherhood a couple of years ago. I find the world intriguing, the writing style interesting and in this particular book, the hero is the ultimate bad boy and I was curious how she was going to redeem him. The cover's very eye catching as well.
The next book I plan on reading is Raymond E. Feist's Rides a Dread Legion. I've been reading Feist's books for years. I've fallen in love with multiple characters from Midkemia. The first book that caught my eye was Shadow of a Dark Queen. The title attracted me and I felt compelled to see what the book was about because of the whole Dark Queen thing. I read it and loved it and have devoured most of the books set in the world.
So what attracts me to a book? If I'm doing a quick browse, it's all about name recognition. I look for my favorite authors to see if there's anything new. If I'm loitering in the store then I'll check out titles and see if anything intrigues me. Finally, if it's on the endcap, it's all about the cover. Then I read the blurb and the excerpt. If I'm on the fence then I'll start reading the first few pages and see if I get hooked.