During Spring Break, mystery lover Amy looks for clues to the disappearance of wealthy Ms. Sullivan's Saint Bernard puppy

Members of the Critter Club are all excited about their summer plans until Liz learns that, instead of taking an art class, she will have to be in summer school to improve her math skills, but a fun teacher, a classroom pet, support from her friends, and advice from her brother might get her through

Amy so looks forward to meeting her future stepsister, Chloe, that she is not prepared when Chloe first ignores her than is downright mean

Liz is excited that her three best friends are visiting her family's cabin at Marigold Lake, but something seems to go wrong with every activity she planned

As Christmas nears, Amy and her friends in the Critter Club try to find a home for two adorable guinea pigs

As her friends in the Critter Club animal shelter care for colorful aquarium fish, second-grader Liz and her family spend a long weekend at the beach, where Liz rescues a baby octopus and competes with an unfriendly young neighbor in a sand castle contest

"Amy has never liked being in the spotlight. When all her friends decide to form a team for the Santa Vista Quiz Bowl, Amy's not so sure. She knows she can answer the quiz questions...but can she do it in front of hundreds of people? Meanwhile, The Critter Club is caring for some chickens who need a home. As the Quiz Bowl approaches, Amy herself starts feeling just a little bit chicken!"--

Liz is excited for her sleepover at the museum until she hears some spooky noises that may turn this sleepover into a nightmare

"When Amy meets the owner of a brand-new puppy at her mom's vet clinic, she agrees to help the woman train her new pet. Amy does such a great job, she starts getting calls from more puppy owners! Things go great for a while, but soon, Amy is in way over her head. She can't say no to a puppy in need and has taken on way too many clients! Amy barely has time for school or her friends in between all the puppies. Can she dig herself out of this hole before...

Liz and her friends are spending a fall weekend at the cabin at Marigold Lake, planning to bake pies and enjoy nature, but Lizzie forgets to put sugar in her berry pie--a mistake which proves fortuitous when she needs a lot of berries to feed a migrating goose who has fallen behind his flock

Amy is excited for her step-sister to visit, but when everyone, including the snake the Critter Club is watching, seems to love Chloe, Amy starts to wonder if they all like Chloe more than they like her