HarperCollins Children's scoops 'unforgettable' novel in two-book deal with Gardner and Mould

Gardner commented: "I am excited about Pernickety Boo – I’ve had such fun writing it and been most fortunate to have Tom Bonnick as my editor and to have the wonderful artist Chris Mould doing the illustrations. I can’t wait for it to be published.”

"It’s always a real pleasure and a pleasant surprise to find yourself working with someone you’ve admired from a distance over the years," said Mould. "I know Sally’s work well and could not miss the opportunity to join forces with her on a fun and quirky adventure that has set my creative brain whirring."

Bonnick added: “From the moment Sally first described Pernickety Boo too me, I was – just like Pernickety – completely spellbound. No one other than Sally could have told this story (or written a book from the point of view of an umbrella!) – it has the assuredness and bold originality of a writer working at the height of their powers. And I am happy that the book will be illustrated by Chris, whose work combines exquisite draftsmanship with a one-of-a-kind style that is the perfect match for Sally’s singular voice."