Author: Michelle HarrisonCrime & mystery fiction (Children's / Teenage)Published on 12 March 2026 by Simon & Schuster Ltd (Simon & Schuster Childrens Books) in the United Kingdom.Paperback | 288 pages129 x 198 x 22 | 210g Can stopping time solve a murder? Journey to a house on a clifftop and discover the secret of a cursed painting in a puzzling mystery from the bestselling and award-winning Michelle Harrison. For fans of Robin Stevens and Cressida Cowell.Our story begins with identical twins . . . Spike and Merry are back on the case – and this time they're in Greece. The cursed Medusa painting is up for auction, but anyone who looks at it directly, will die. When one of the bidders is found dead and the painting's owner goes missing, the twins use their time bending powers to investigate. Is it really a curse, or is someone out for revenge . . . ? ?Praise for Twice Upon a Time:‘Everything Michelle Harrison writes is gold dust and this is no exception. A thrilling mystery told by one of my favourite writers. I couldn’t put it down’ Abi Elphinstone 'There is no-one who writes sisterly bonds quite like Michelle Harrison! A twisty-turny inventive read full of adventure and magic’ Hannah Gold ‘A brilliantly plotted gothic mystery, children are going to love getting lost in Fox House’ Zohra Nabi ‘Spell-bindingly good! A time-twisting triumph of mystery, magic, and mischief. Michelle Harrison has done it again. I wish I could rewind time to read it afresh’ Jack Meggitt-Phillips ‘A quirky, creepy, time-twisty murder mystery. I loved it!’ Lucy Strange ‘A thrilling and gripping murder mystery that plays out like an Agatha Christie or Sherlock Holmes novel.’ Phil Hickes ‘Fabulous!’ Lisa Thompson
