Dinosaur Lake VI: The Alien Connection. Dinosaur Lake, #6

Henry Shore has spent the last decade hunting for, fighting, protecting people from, and exterminating rogue dinosaurs in his beloved Crater Lake National Park, and the towns around it. Once the Chief Park Ranger there, now he's retired and, since all the dinosaurs are supposedly gone, he's trying to live his best retirement life. Except, for Henry, that doesn't seem to be possible.because of a new sorrow he's had to shoulder, and a new insidious breed of super-smart, highly intuitive dinosaurs that have suddenly emerged to again menace humanity.
Henry is asked to track them down; and he's dragged back into the fray. Besides being asked to battle this new threat, Henry has also been invited by his paleontologist son-in-law, Doctor Justin Maltin, to join a top-secret government team of research scientists at Area 52 investigating the original and apparently ancient origins, of the earth's earlier plague of dinosaurs-and two mysterious alien spaceships stored there.
What Henry becomes a part of turns out to be so much more than even he could have imagined. A true alien enigma. There's something mysteriously mindboggling at Area 52 and Henry will help uncover its mystery, and, in doing so, will have the most incredible experience of his life-and that's saying a lot for a seasoned dinosaur hunter. There are now nine Dinosaur Lake novels.