|Panther Science Fiction paperback, 1974. Artist uncredited,|
possibly Bob Haberfield.
"Nicholas Coad, the Savage Mandarin: detached, scientific, 'converted' into a state of 'sublime, cosmic indifference'. He is working on a unique project - the 'conversion' and liberation of the soul or higher self from chains of physical bondage. His 'patient' is his good-natured neighbour, Rogers, up-and-coming ad-man. Rogers does not realise that his piercing headaches are caused by the fearsome, hypnotic in coad's flat. But as coad brings him further along the path to liberation, he has no choice. After all, his brain now resembles a chunk of Gruyére cheese..."
Well, you don't see a book cover like that every day (!) the artwork looks familiar but I can't place a name. Haven't read this one yet (like so many others - my 'reading list' is seven feet tall) but judging from the synopsis on the back cover, it's the literary equivalent of taking a few 'shrooms. Thanks to Mark for suggesting the cover artist might be Bob Haberfield, it looks psychedelic enough to be his work to me!