The Incredible Jeep by Clarence Budington Kelland

Clarence Budington Kelland published an one of four parts of a novel called "The Incredible Jeep" in the American Magazine in November of 1941. It appears he followed that by publishing the entire novel in 1942. Is anyone familiar with the story?

Here's a reference to the Magazine on eBay

Incredible Jeep, The (Gold Seal Novel, presented by the Philadelphia Inquirer, Sunday, November 22nd, 1942)