The Book Challenge discussion

Can someone please tell me exactly where I can find more book challenges. I love doing book challenges or at least looking for the books because I find new books and get excited about reading them. I know my TBR shelf gets bigger but still I just like looking at books so can someone help me please!

Have you looked at the Pick-a-Shelf group. Other than the monthly book we read, we have this cool challenge called the Shelf-a-thon, where you try to read as many books to touch all the shelves on our Shelf-a-thon list in three months. It's pretty fun. Anyway, go to the group page if you are interested or want more info and read the topic Shelf-a-thon Round 2.