I always loved the summer reading program at the library. This is a great challenge for me because I haven't been reading as much lately. This challenge began at the beginning of May, and ends at the beginning of September. Your goal has to be at least five books, but the rest is up to how much you want to read.
My goal will be 100 books.
Here's where I got the challenge: http://katiesbookblog.com/2014/04/2014-book-blogger-summer-reading-program.html
This post is also posted on my blog.