The first half of the book was slow-going and felt very much like a kid's book (kid main characters, a time machine van, and pet dinosaurs). However, in the second half, the story became quite enjoyable as the search for Jason and the Argonauts and the Golden Fleece got underway. I especially enjoyed the secret of the Minotaur. Great ending to lead into book #2. For the adventurous time-travel-loving myth-loving kid in us all.