James Patterson writes books that are so easy to read. The Alex Cross books have just the right level of detail. The plots are nicely put together - they have some style (as opposed to those he co-writes, which have their merits but you don't really have to think too hard when you read them).
Along Came a Spider is a great book, it deals with the kidnapping to 2 small children and the repurcussions of those actions. It also created a memorable villan and threw in a nice twist.