A reckless young mouse named Ralph makes friends with a boy in room 215 of the Mountain View Inn and discovers the joys of motorcycling.

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.

At Greenglass House, a smuggler's inn, twelve-year-old Milo, the innkeepers' adopted son, plans to spend his winter holidays relaxing but soon guests are arriving with strange stories about the house sending Milo and Meddy, the cook's daughter, on an adventure.

Leo and Remi have gotten used to the strangeness of the Whippet Hotel, but when the entire top floor is hoisted into the sky and transported to the field of wacky inventions, they find that they must compete against a number of foes to solve a puzzle or lose their beloved hotel forever.

The Aldens try to solve a series of mysteries which took place in a old hotel in Kansas which they visit.

In 1906, sixteen-year-old Mattie, determined to attend college and be a writer against the wishes of her father and fiance, takes a job at a summer inn where she discovers the truth about the death of a guest. Based on a true story.

Geronimo tries to enjoy his seaside vacation even though his hotel is dilapidated.