The Code of the Woosters (Jeeves, #7)
Take Gussie Fink-Nottle, Madeline Bassett, old Pop Bassett, the unscrupulous Stiffy Byng, the Rev., an 18th-century cow-creamer, a small brown leather covered notebook and mix with a dose of the aged aunt Dahlia and one has a dangerous brew which spells toil and trouble for Bertie and Jeeves.