Doesn't really narrow it down much.
What do you like? What genre? Need a little more to work with
As a random try though;
Flashman - George MacDonald Frasier.
Great series of books.
"Old Man's War" by John Scalzi. An excellent book that had me hooked from the beginning. 75 year olds going to war? That's an interesting premise. Good storyline, good characterisation, some truly touching moments (Maggie), lots of action and a open ending that didn't feel like being robbed on closure. I think I may move on the some more of Scalzi's work on this basis. I can recommend the audiobook as the narration is perfect for the text.