Looking at the author's claims about murder here, it's not hard to find evidence that squarely contradicts his conclusions so we have to ask, how useful is this book?
Look at just one of the cases the author claims to have been a a murder: Captain Richard Bethell, who died on November 15, 1929 was Howard Carter's 46-year-old personal secretary. He was found dead in bed at the exclusive Bath Club in Mayfair. It was claimed he was in perfect health, and that he died of a heart attack. But later his symptoms raised suspicion that he may have been smothered. Crowley (who the author blames for many murders in this work) was often a guest of novelist W. Somerset Maugham at the club, and had apparently recently returned to London.
A small amount of research suggested that Captain Bethell actually died from Emphysemia and was not smothered. Over 100 people regularly dined at the Bath Club. Beynon may as well accuse Somerset Maugham of being the killer - at least he was a member which Crowley wasn't. There's lots more research to contradict the author's theory on line. Start with [...]