I have been getting this reading challenge a lot via email, and I think it is pretty solid. 50 books is a lot (and some crazy people are trying to do 100), but if you want something a bit more manageable, try 20.
This one is also great because you can present this to your teens, kids, parents, siblings, partners, etc. It might just get them to read something.
P.S. If you are wanting this infographic created by Reader Joy (adapted from Naomi Bates), just right-click and open in new window or new tab.