Looking for gift ideas for my dad. He loves LOTR, HP, Clive Custler. I got him the first Dune book and he seemed kinda lukewarm on it.

Stephen Hunter Bob Lee Swagger series,

The Vorkosigan Saga Lois McMaster Bujold,

Jim Butcher Codex Alera series,

James Rollins,

Jack DuBrul,

Matthew Reilly,