Footprints of Thunder - Thunder, Bk 1 Author:James F. David When a freak natural phenomenon dissolves the boundaries between yesterday and today, the world is transformed into a patchwork mixture of the present and the distant past. Entire cities are replaced by primeval forests. Prehistoric monsters stalk modern city streets, hunting for human prey. While ordinary men and women struggle to survive... more » in this strange new world, the president and his advisers search for a way to undo the catastrophe. But the solution may be more devastating than the dinosaurs...« less
Pretty decent dinosaur premise, with a rather convoluted theory accounting for the "time quilt" that brought the dinos to the present day. A quick and easy read, there are threads left hanging for the eventual sequel.