I read Ender's Game a couple of years ago because of your recommendation and thoroughly enjoyed it.
I'm sitting here looking over at my bookshelf and it appears the entire Dragonrider series is calling my name. However, whispering from the shadows is "Stranger in a Strange Land," my favorite Heinlein book.
Before my cataract surgeries, I had gotten away from reading. I watched movies - TONS of movies - instead. It's pretty easy when your best friend has a video store. Lately, though, so many of the movies are disappointing or just plain dull. I think there are a lot of books (including many of the ones on my bookshelves) I'll be devouring during TDOS.![]()
The Ender series is also interesting because of how he tackled it. The original trilogy (Ender's Game, Xenocide, and Children of the Mind) get a bit stranger as you progress if I remember correctly (haven't read the last two in a LONG time). But he also writes a set of books set around Bean, one of the other boys in the original book, so you can follow much of the story from multiple character's point of view in separate books.
Have you read the Chronicles of Thomas Covenant the Unbeliever (Chronicles, Second Chronicles, and Last Chronicles)? Two trilogies and a follow up series of 4 books. Start with Lord Foul's Bane and go from there! I started reading the first series in 8th grade on a recommendation from a friend and the last book just came out in 2013.