The 20's group that I lead at New Like Oak Forest just finished reading together the book Crazy Love, by Francis Chan. It is a a great book about what it means and looks like to be madly in love with God. It's a great book that I highly recommend you check out. Here's the book's website: Crazy Love.
The cool thing is that you can get it for free! Apparently the website ChristianAudio.com offers a free download each month, and this month it is Crazy Love!
It's completely legit. All you have to do is create an account to get the download. No strings attached, except probably an email from them a month.
CLICK HERE to go to the sign-up/download page. Make sure you use the indicated coupon code to get the book for free!