The Whizz Pop Chocolate Shop - Saunders, Kate, 1960-2023 (New York : Delacorte Press, 2013)
Eleven-year-old twins Oz and Lily are recruited by a talking cat to assist her and M16 in foiling the dastardly plans of their great-great-uncle, a chocolatier who used magic to make a candy that bestows immortality.
Keywords: Magic -- Fiction; Adventure and adventurers -- Fiction; Immortality -- Fiction; Cats -- Fiction; Brothers and sisters -- Fiction; Twins -- Fiction; London (England) -- Fiction; England -- Fiction