Dinosaurs Before Dark 
 by Mary Pope Osborne 
 An excellent series of books that mix nonfiction learning into a fictional story with series characters. 
 The action is fast-paced and the time travel aspect is sure to appeal to young readers. 
 The main character, Jack, and his younger sister go on an adventure together. Jack's attitude towards his sister is caring but a bit exasperated at times, which is very true to a real life brother/sister relationship at that age. 
 The pictures, though black and white, are well-drawn and add to the richness of the story.