They were eight candidates who arrived in ''Humpstead Manor'' - otherwise known as ''the Hump'' - all of whom were part of an elite interview process for a major job in Africa. But even before the examinations began, one of the assembled seemed to be being singled out for something rather more a great job. Murder. Inspector Cam finds that what he thought was a relaxed trip observing how the process worked, finds he is needed to do a lot more than observe. Deadly Earnest, published in 1952 was the third and final novel that came from the Joan Cockin stable. It''s a strong candidate to be her best.