The "Penderwicks" is a children's book series written by Jeanne Birdsall. It follows the adventures of the four Penderwick sisters—Rosalind, Skye, Jane, and Batty—as they navigate life, friendship, and family. Set primarily during their summer vacations, the stories highlight their imaginative escapades and the bonds they share. The first book, titled "The Penderwicks: A Summer Tale of Four Sisters, Two Rabbits, and a Very Interesting Boy," was published in 2005. The series has received critical acclaim, winning the National Book Award for Young People's Literature and appealing to readers for its heartwarming themes and relatable characters.