Bestselling Norwegian mystery author Jo Nesbø enters the world of children’s books with Doctor Proctor’s Fart Powder, the first book in this very funny middle-grade series. Filled with magic, wit, and bathroom humor, Doctor Proctor will keep boys and girls laughing until the end. Eleven-year-old Nilly is new to the neighborhood, but he is quick to make friends: Doctor Proctor, an eccentric professor who invents wacky potions and powders; and brainy Lisa, who is always teased by the twin terrors Truls and Trym. All is good farty fun when Nilly and Lisa help Doctor Proctor develop his latest invention, a powder that makes you fart. The powder makes Nilly and Lisa VERY popular at school when they sell it for 50 cents a bag. (And they get revenge on Truls and Trym by giving them an extra-strength dose of fart powder that shoots them up into a tree!) But when Doctor Proctor creates an industrial-strength version that can send people to outer space, the kids must go to great lengths to protect the invention and keep it out of the hands of their neighbors, who want to use the powder for evil purposes. In the spirit of Roald Dahl and Lemony Snicket, Doctor Proctor offers a winning combination of humor, adventure, and absurdity that kids (of all ages) will love—proving that Jo Nesbø can keep you on the edge of the seat and make your sides split in equal measure.

The Fart Powder was such a successful invention that Doctor Proctor, Nilly, and Lisa couldn’t stop there. Next up: a time-travelling bathtub. You just hop in, lather up the Time Soap, and wish for where you’d like to go. Doctor Proctor has plans for this 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 it. But when things go wrong, it's up to Nilly and Lisa to travel back in time to right all wrongs and reunite the two lovebirds. Nothing is quite so simple in a Jo Nesbo book. Enter a herd of hippos, a scheming assistant, and Time Soap that keeps going awry, sending Nilly and Lisa to the storming of the Bastille! Fortunately, as in every Jo Nesbo book, the Fart Powder solves everything.

Doctor Proctor, Nilly, and Lisa take a sporty approach to saving the day in this fart-tastically funny adventure from New York Times bestselling author Jo Nesbø. 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 the precious prize. But after a failed break-in attempt at the billionaire’s subterranean gold-melting lab, and with the Norwegian Gold Reserve Inspection in just three days, the only way to retrieve the trophy is to win it back. Hoping to prevent national panic and uproar, Nilly and Lisa join the Rotten Ham soccer team to try and lead the hopeless underdogs to victory before time runs out. And with the use of Fartonaut Powder, along with a handful of Doctor Proctor’s other wacky inventions, they just might have a chance!