Danny and the Invasion of the Dinosaurs: This book was written and illustrated by David T. Lee at age 9. It is the sequel of "Danny and the Trip to Outer Space" and "Danny and the Portal of the World". It has 19 chapters, 17,000 words and 7 full page illu in Bloomington, MN

What if the greatest threat to our lives came not from above ... but from the PAST? Against all odds, the fiercest lizards to walk on Earth WALK AGAIN. Inventor Danny Hoopenbiller, no longer a child, must lead the United States Army in their deadliest mission yet. If he fails, humankind will perish at the claws of the INVASION OF THE DINOSAURS.
About The Adventures of Danny Hoopenbiller 5-book series:
Danny Hoopenbiller, the titular character, is an ingenious young inventor. The 5-book series chronicles Danny's ridiculous inventions and heart-pounding adventures. His exploits take him through a diverse group of locations, from Earthly places like New York and Yucatan, Mexico to interstellar settings such as Foodland the Planet Seventh! Whether Danny's fighting for the future of the human race or aiming to get back home after a portal mishap, he always manages to throw in a bit of humor as well. Traveling through time, portals and wormholes, Danny teams up with a colorful cast of allies (e.g. POTUS, US Army, NASA, Albert Einstein's long lost daughter Lieserl, the Havocker brothers and his family) for adventures ranging from an exploration beyond the solar system to high-stakes battles against otherworldly adversaries such as Martians, dinosaurs and Dinozillas! Enjoy this adventure! Books 1 and 2 are not part of the main story arc, but they can be read independently and are written for elementary school readers! Books 3 through 5 contain the main story arc of the series, where Danny (a talented inventor) leads the US Army in a fight for the survival of humanity against intelligent, formidable dinosaur mutants. Advanced readers should start with Book 3, "Danny and the Invasion of the Dinosaurs". No matter where you start, you can be assured that every Danny Hoopenbiller adventure is chock-full of humor and imagination! Book 1: Danny and the Portal of the World
Book 2: Danny and the Trip to Outer Space
Book 3: Danny and the Invasion of the Dinosaurs
Book 4: Danny and the Revenge of the Dinosaurs
Book 5: Danny and the Wrath of the Dinosaurs