What makes you want to read a book?

Once upon a time in my childhood, I read mostly second-hand and library books.  Back in those day, hard cover was the thing, and many hard cover books had glossy paper covers that went over a plain cloth card stock cover.

It was rare for me to see the paper cover of a book, except for the book I always got as a Christmas present.  So, for me, the cover art will turn me off to a book, but won't usually provoke me to buy a book.

Same for the blurb.  The blurb would be on the lost cover.  So I would open the book, read a few paragraphs and decide.  Or know I would like the book because of the author, or because it was part of a series.

What makes you want to buy a book?  Is it the cover?  The blurb?  The author?  Part of a series?  A genre or sub-genre you enjoy?

I'm really curious folks and I would love some feedback.