Seventh-grader Georges adjusts to moving from a house to an apartment, his father's efforts to start a new business, his mother's extra shifts as a nurse, being picked on at school, and Safer, a boy who wants his help spying on another resident of their building.

Nine-year-old Ella considers herself the official greeter, tour guide, and is generally in charge of 1106 Wildflower Place, but the elusive Robinsons who live on the top floor are a mystery--one which Ella is determined to solve, and bring the elderly couple into the community of the apartment building on Poppy Hill.

On a rainy day two brothers try to discover who is playing the harmonica they hear in their apartment building.

Twelve-year old Joy dreams of writing music for the movies, but first she has to survive her family's move into a small apartment when her father loses his job.

"Ten-year-old Liam and his two younger sisters, precocious third-grader Dakota and second-grader Izzy, who has Down syndrome, face the possibility of losing their beloved dog, Cupcake, who keeps urinating on their apartment's carpet"--Provided by publisher.

Eleven-year-old Simon is ready to make the Tangerine Pines his forever home, but when a robbery occurs in the apartment building, he and his new friend set out to solve the case and keep his family from moving again.

When Mrs. Third Floor visits and reports paranormal activity on the fifth floor, Butterbean and the other pets set out to find the truth and save Mrs. Third Floor from being scammed by professional ghost hunters.

When the Alden siblings visit their grandfather's friend in an apartment building, they begin to wonder about the many mysterious events that keep happening on the thirteenth floor of that building.

"Twelve-year-old Minerva Keen forms a detective club to uncover who is poisoning residents of her storied Chicago apartment building, knowing that any one of her neighbors could be the poisoner--or the next victim"-- Provided by publisher.

When Edmond Bigsnout, a lone wolf, sets out to satisfy his craving for a city rabbit, his efforts are foiled by apartment dwellers who think he is a new neighbor.