An Archway Paperback Original. Minor bumping/edgewear, inside covers starting to yellow. A tight, attractive copy.
"Tom Swift’s latest invention has set off an evolution revolution in reverse. His microradiation DNA scanner, destabilized by a black hole created in an earlier experiment, has created a biological time warp. Now the scanner’s beam of alien energy threatens to put the entire world into prehistoric peril. A house cat is transformed into a ferocious saber-toothed tiger. . . a mynah bird becomes a carnivorous flying reptile. . . and Tom’s friend Rick devolves into a rampaging ape-man. Tom must find a way to defuse the DNA time bomb before a savage new Stone Age explodes into being!"
Age Level: Grades 4-10; 12mo - over 6¾" - 7¾" tall