Looking forward to a vacation, Katie, Lily, and Jasper attach their flying Gyroscopic Sky Suite to the Moose Tongue Lodge and Resort, where they mingle with other child heroes found in books, and where they become embroiled in a mystery involving lederhosen-clothed quintuplets and a screaming ventriloquist.

"P.T. and his friend Gloria must solve a mystery at the world's wackiest motel: The Wonderland"--

Ten-year-old Leo's future and the fate of the extraordinary Whippet Hotel, where his father is the maintenance man, are at stake when a series of cryptic boxes leads Leo to hidden floors, strange puzzles, and unexpected alliances.

While visiting Aunt Molly at a fancy downtown hotel, Cam uses her photographic memory to help one of the guests find her stolen luggage and pet cat, and to catch the thief.

Seth is a kitchen boy at the remote Last Chance Hotel. One night, a band of magicians begin to arrive to participate in a secret meeting. But when the doors to the private meeting open, and Dr. Thallonius lay dead on the floor, the group blames the dessert, which means that it's Seth who will pay the price.

"Mia Tang has a lot of secrets. Number 1: She lives in a motel, not a big house. Every day, while her immigrant parents clean the rooms, ten-year-old Mia manages the front desk of the Calivista Motel and tends to its guests. Number 2: Her parents hide immigrants. And if the mean motel owner, Mr. Yao, finds out they've been letting them stay in the empty rooms for free, the Tangs will be doomed. Number 3: She wants to be a writer. But how can she when...

While staying at the remote and reputedly haunted Maine inn run by her father and pregnant stepmother, sixteen-year-old Cynda feels increasingly isolated from her father's new family and finds solace in the attentions of a charming but mysterious guest.

Charlie and Annie find Tyler and the magician Brack on the thirteenth floor of the Abracadabra Hotel, but Charlie and his friends still have to solve the mystery of who is trying to steal the twelve priceless statues of Enrico Endriago which have been locked in room 1308 for fifty years.

During the Depression, a young Memphis boy trains his pet duck to do tricks in the fountain of a grand hotel and ends up becoming the Duck Master of the Peabody Hotel.

Brack, owner of the Abracadabra Hotel, has disappeared at a critical time, and once again Charlie Hitchcock and Tyler Yu team up to solve the mystery--they know he never left the hotel, but the only clues they have is a few words scrawled on a piece of paper and a clump of fake red hair.