A mysterious postcard leads Lisa and Nilly from Oslo to Paris in search of Doctor Proctor but, once there, all they find of their missing friend is a time-traveling bathtub powered by a special soap and several sinister individuals determined to do all they can to locate the eccentric inventor.

Can Doctor Proctor, Nilly, and Lisa save Christmas in this new fart-tastically funny adventure from worldwide bestselling author Jo Nesb�? When the king of Norway sells the rights to Christmas to Mr Thrane, it looks like the holidays aren't going to be very merry. Mr Thrane says that the only people who can celebrate are those who buy 10,000 crowns worth of presents from his department store. For anyone who doesn't - or can't - spend that much, it's no tree, no presents, no carols, and no Christmas pudding. ​Doctor Proctor, Nilly, and Lisa aren't going to take this sitting down! They're going to find Santa and save Christmas. All they need is a sleigh, flying reindeer, some time travel soap, and, of course, some fart powder! PRAISE for the Doctor Proctor's Fart Powder series: 'This terrific book will make you laugh, and cherish your friends' - James Patterson 'plenty of toilet humour, and general silliness that kids love' - The Bookseller 'wickedly entertaining' - The Big Issue 'Lashings of silliness, quirkiness, self-deprecating humour, and a rollicking plot...' - TheBookbag.co.uk 'Fuelled by farts, this is fast-paced and a delightfully ridiculous adventure' - Julia Eccleshare on lovereading4kids.co.uk 'A superb mix of bizarre and wacky with a little bit of off-beat thrown in. Reminiscent of Roald Dahl it has all the elements to keep children hooked...' - Waterstones

The Fart Powder was such a successful invention that Doctor Proctor couldn't stop there. Next up: a Time-travel Bath Bomb. Throw the Bath Bomb in the tub, lather up and imagine where you'd like to visit. The battle of Waterloo? No problem. The French Revolution? Let's go! Doctor Proctor has plans for this new invention. Years ago he lost his true love, Juliette Margarine, and now he wants to change the past and win her back. But when his plan goes awry, it's up to Nilly and LIsa to travel in time and save the day.

The fart powder was such a successful invention that Doctor Proctor couldn't stop there. Next up: a time-travel bath bomb. Throw the bath bomb in the tub, lather up and imagine where you'd like to visit. The battle of Waterloo? No problem. The French Revolution? Let's go

"When a Russian billionaire robs the Norwegian Gold Reserve and melts the last remaining gold bar into the Premier Soccer League trophy, it's up to Doctor Proctor, Nilly and Lisa to recapture it"--

Sing your heart out with a whole choir of characters, in the showstopping new picture book from number one bestselling author David Walliams, illustrated by the artistic genius, Tony Ross!

An eBook boxed set of Jo Nesbo's Fart Powder series, featuring Doctor Proctor's Fart Powder, Bubble in the Bathtub, and Who Cut the Cheese?. In Dr. Proctor's Fart Powder, eleven-year-old Nilly moves to his new neighborhood in Oslo, Norway, and meets his neighbor, Doctor Proctor, an eccentric professor who invents wacky potions and powders—including an industrial strength fart powder that can send people to outer space. Bubble in the Bathtub features even more hijinks as Doctor Proctor has plans for a new invention. You see, he lost his true love years ago, when Juliette Margarine married an evil count. The good Doctor has never quite gotten over this, and he’s going back to change the course of history. But when things go wrong, it’s up to Nilly and Lisa to travel back in time to reunite the two lovebirds. In Who Cut the Cheese? Nilly, Lisa, and Doctor Proctor are too busy inventing things to watch TV, and everyone says they’re missing out on the hot singing competition. But then Nilly and Lisa notice that their friends and family are acting really weird. And the only people acting weird…are the ones watching TV.