Five Have a Puzzling Time and Other Stories
by Enid Blyton (Red Fox, 1995); republished as “The Famous Five Short Story Collection” (Bolinda, 2021)
For completists only. These short stories are aimed at very young readers, and the mystery/adventure elements are slight at best. The audiobook omits dialogue tags in favour of multiple voice actors, of whom Julian in particular sounds like a self-parodying boarding-school pretzel.