The chase is on to stop Dr. Van Heerden before he can release the threat of the Green Rust and take over the world in this exciting page-turner, originally published in 1919, from the undisputed 'King of Thrillers, ' Edgar Wallace. During the 1920's and 30's, it was said that one of every four books read in England was written by Wallace, who ultimately produced 173 books and 17 plays.