Eight-year-old Impy, dismayed at the changes she sees in her rapidly maturing twelve-year-old cousin Christina, stubbornly tries to continue their former sharing of dolls and funny nicknames, but Christina persists in growing up
Jackie French Koller (born 1948) is an American author of picture books, chapter books, and novels for children and young adults. She lives and writes in western Massachusetts.
Koller is also an accomplished painter. Her interest in art inspired her to open The Little Black Dog Gallery in Westfield, Massachusetts.
Koller's young-adult novel If I Had One Wish was adapted into a Disney Channel Original Movie under the title You Wish!.