Anastasia continues the perilous process of growing up, as her thirteenth year involves conquering the art of rope climbing, playing Cupid for a recently widowed uncle, and surviving a crush on her gym teacher.

Anastasia's tenth year has some good things, like falling in love and really getting to know her grandmother, and some bad things, like finding out about an impending baby brother.

Irrepressible Anastasia is in junior high now and participating in the "Values" curriculum through which students learn to make moral decisions. Early one morning she hits the Cambridge streets with her pooper-scooper to walk her new dog. In her half-awake groggy state Anastasia mixes up the two plastic bags she's carrying: one containing letters to be deposited in the mailbox for her mother and the other with her responsible morning gatherings. She's too embarrassed to call the post office to confess and she begins to feel more and more guilty and scared as she notices some intense local police activity in the vicinity of the mailbox. What will Anastasia do?

Ready for romance, thirteen-year-old Anastasia answers an ad in the personals with an exaggerated description of herself but soon runs into trouble when the unknown man turns up at a friend's wedding.

Her family's new, organized schedule for easy housekeeping makes Anastasia confident that she can run the household while her mother is out of town, until she hits unexpected complications.

Twelve-year-old Anastasia Krupnik is convinced that her family's move to the suburbs will be the beginning of the end. How can she possibly accept split-level houses with matching furniture, or mothers whose biggest worry is ring around collar? But her new home brings many surprises, notto mention a cute boy who lives down the street. Is it possible that surburbia has more to offer than Anastasia had expected?

Anastasia's seventh-grade science project becomes almost more than she can handle, but her brother Sam, age three, and a bust of Freud, aid her nobly.