I don't read much fiction either. I did read more when I was younger. I enjoyed many of the Halo books (there are a couple duds in there too), which lead me to other books authored by Eric Nylund. I like his writing style, even though he has more fantasy elements to his stories than I would typically like but it somehow works. A Game of Universe and Mortal Coils are some that I have read. I also read some of the Splinter Cell books. They were ok from what I remember, but probably only good if you liked the games. Tom Clancy has some good books (the Splinter Cell game books are ghost written). I remember Rainbow Six was a good one. You could also try non-fiction adventure books. Since they are set in areas you are not familiar with, your brain still has to build the environment and imagery. Something like One Man's Wilderness. I enjoyed that book. I used to read and listen to books like Hatchet and this was along the same lines but non-fiction. I'd also say to be careful about these. For me, it makes me want to quit and live on a farm.
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