Publisher's Synopsis
DEAR THOS, My present address is bound to prejudice you against me, but do please reserve judgment until you have read this letter. No doubt most of us in this comfortable prison think we ought to be at large, and most are mistaken. But not all, so for God's sake keep an open mind. I am not concerned for myself. They treat me well here, and I can carry on my research in para-norrnal and super-normal psychology as well here as anywhere, since I am used to being my own guinea-pig. But by accident (yet it was really no accident at all, as you will learn) I have come into momentous knowledge; and if mankind is to be saved from a prodigious and hitherto entirely unforeseen disaster, the facts must somehow be made known
