This is a decent adventure story for lovers of time travel and dinosaurs,there's even trips to the moon. The book is a sequal to Footprints of Thunder, which I haven't read but that didn't spoil my enjoyment in anyway, though it did seem to be a little disjointed at first, everything comes together well as the story unfolds. There's rather a lot of characters to keep up with too, but they all mostly play important parts in the tale. I sometimes found myself getting slightly confused with some of the time travel elements, but that's probably just me and with a bit of concentration I understood it. This book is well worth a read if the subject matter is your thing, I found it all fascinating and quite entertaining. There's plenty of blood and guts too,what with all the dinosaurs and a race against time to save the future of the world. Read it and experience the thrills, I think I preferred it to Jurassic Park and that's no disrespect to Michael Crichton whose books I greatly admire.