Night time reading list for 7 1/2 yr. old boy

Wanted to let you all know that our son chose, First contact : scientific breakthroughs in the hunt for life beyond Earth to have me read each night. We are on the 5th night of reading and he seems to be enjoying it. Pretty dry expose on extremophile life on earth and the potential in space. Thanks to everyone for contributing and please keep those titles coming, we'll be looking for another title soon.

Each night before bed I read to my son and I was wondering if any one had some ideas about what to read next. The list of books we've read to date is generally non-fiction and tends toward science. Here a list of books I recall reading to him to give you an idea:

• Failure Is Not an Option: Mission Control from Mercury to Apollo 13 and Beyond
• Two Sides of the Moon: Our Story of the Cold War Space Race
• Fire Season: Field Notes From A Wilderness Lookout
• The Omnivore's Dilemma: A Natural History of Four Meals
• The Botany of Desire: A Plant's-Eye View of the World
• Rocket Boys (October Sky)
• All Creatures Great and Small (Complete Series and BBC TV Series)

Any ideas are greatly appreciated. Not to worry, we read lots of Garfield, Magic School Bus and other more kid oriented books during the day but not at bedtime.

Thanks!