Mega Sleepover: Sleepover Club Omnibus: No. 4 by Rose Impey
This three-in-one volume includes Happy Birthday Sleepover Club - the girls celebrate the Sleepover Club's 10th birthday in style - until they all start squabbling; Sleepover Girls on Horseback - can the gang save the riding school?; and Sleepover in Spain - trouble in the Costa Brava.