MUCH OBLIGED JEEVES (FIRST SPHERE BOOKS EDITION 1972)
Like Wooster is a member of the Drones Club, Jeeves is also the member of a club called Junior Ganymede, which is a club for butlers. This club has a secret book with detailed accounts by the butlers about their employer's imperfect and not - so - gentlemanly characters and habits. This book somehow gets stolen and since it has explosive tales, it has to be recovered as soon as possible before it gets into the wrong hands.