Every man and his dog, at some stage or other, will recommend The Hitchhiker's Guide To The Galaxy by Douglas Adams, to at least one person -- and here I'm recommending it to you. It's ... comedic science fiction, I think, and it's a very cheerful, easy read. Adams writes conversationally and tells the story rather than playing with his vocabulary. It's available for Kindle here. Don't forget that Amazon lets you download free samples to your Kindle before buying a book -- the free sample is often the entire first chapter. Happy reading!