Psychogeist - L.P. Davies (Mayflower 1966)

It's been a while since I posted a good book cover so here's one from 1966. 

It's actually a good read too but finding more of his work will be a matter of pure luck in charity shops by the looks of it. 

Little is known about Davies, an English author, although the scarcity of details combined with his subject matter (sci-fi, fantasy, conspiracy, mind games) no doubt make him a cult author.

There's some writing about him here and here.