Comment on The Fault in Our Stars by spinda101

A lot. Over a dozen. There are 3 in the original series, then others that are told from different character's POV, what happened before, during, and after Ender's story that we didn't get to see? (I prefer Bean's story to Ender's)
I recommend starting with Ender's Game and Ender's Shadow. Same time frame, different POVs.

I think there's three books in that line, then there's a few spin off books that happen in the same world.