re: Recommend a book for my 10 year old boy?

Battle Britain by Quentin Reynolds - generally accurate in terms of what happens, but I'm sure it is historical fiction, account of the Battle of Britain. Can honestly say this is one of the books that made me fall in love with books, probably read it 10 times as a kid. Can't recommend this one enough.

If you don't go with that one, I would also recommend Mossflower - Brian Jacques, its phenomenal and they have an entire series of books. This is another one that I read a ton as a kid and absolutely loved. Its like mice and woodland creatures fighting a tyrant wildcat, but follows a lot of the great archetypes and is really well done. I re-read it for nostalgia this past year and it still holds up.

Based on your other suggestions another classic like Robinson Crusoe would be good. Also something like the Hobbit or Harry Potter would be good.