St. Clare's is a series of six books written by British children's author Enid Blyton about a boarding school of that name. The series follows the heroines Patricia ("Pat") and Isabel O'Sullivan from their first year at St. Clare's on. Other characters include Alison O'Sullivan (the twins' cousin), Hilary Wentworth, Carlotta Brown (an ex-circus girl), Janet Robins,Doris Elward and Bobby Ellis.