Andy Andrews "The Lost Choice" and "The Travelers Gift" were wonderful, I particularly loved the latter.
Kate Mosse "The Labyrinth" and "The Sepulchre"
"Mists of Avalon" (fabulous book)
Patricia Cornwell: "Postmortem" to "The Last Precinct" (it's her Kay Scarpetta series and although there's more in the series she really goes downhill in her writing, IMO, after "the last precincnt" but everything before that is fantastic)
Practically anything by Iris Johansen particularly the Eve Duncan series
"The Historian" (not really horror, more like suspense and history)
"The Thirteenth Tale: A Novel" Diane Setterfield (I got everybody at work hooked on this book, it was awesome! Best book I've read in 2 years)
"Jonathan Strange and Mr. Norrell: A Novel" Susanna Clarke (this one took me a while to get into but once I did I couldn't put it down)
"What's so Amazing about Grace" Phillip Yancy (Non fiction, excellent book really made me think)
Paulo Coelho "The Alchemist" and "The Fifth Mountain"
"Velvet Elvis" (Non Fiction)

That's just the ones off the top of my head. I also read all kinds of other stuff...pretty much anything that interests me I read. I decided one time that I didn't know enough about Ancient Greece and Alexander the Great so I went out and got some books about him. I love anything about King Arthur.
I also read A LOT of fanfiction online which is fun when I'm trying to go to sleep or just need something mindless to make my brain calm down. But those books I mentioned above are the ones that I would be likely to take with me while I'm riding. I like to stop after so many miles, sit down outside where it's quiet and read a bit then head home.
If you want to discuss any of these, please let me know.
Gray