Please help me with book recommendations for my nephew. He was always a completely voracious reader but is struggling to find things that grab his attention but that are reasonably age appropriate. He particularly likes adventure stories, but he's too old for Alex Rider and the like. When I have looked at adult books for him there is a surprising amount of low grade sexual violence which I dont think he needs to read. Same with torture. He also likes fantasy but isn't into romance at all, which is again difficult.
He has read every percy Jackson and the spin offs about a million times
He likes the Skandar books
He liked the Eragorn books
Loved the Hunger Games
Liked the Inheritance Games but they got a bit samey and too much romance
Liked Skulduggery Pleasant
Not keen on Terry Pratchett (i think he is a bit young and the humour doesn't work for him)
Liked Lord of the Rings "ok"
Any thoughts very welcome! He has asked for books for Christmas (just like his auntie!) but I just dont know where to start.