Join Daisy and Lily for another sleepover!The summer holidays have finally arrived, and Daisy is bored. She's glad she won’t have to see her worst enemy Chloe for the whole summer, but she's desperate for a proper holiday at the seaside, building sandcastles, eating lots of ice cream and maybe even spotting a mermaid in the sea!Daisy’s sister, Lily, wants to come too but, she uses a wheelchair which can make trips to the seaside tricky. Especially with all that sand!Daisy’s summer gets a bit more exciting when she starts looking after her neighbours’ dog, Scruff. Daisy has always wanted a dog of her own to walk and cuddle! She knows Scruff would love a trip to the seaside just as much as her. Will Daisy, Lily and Scruff get their ice cream-filled dream holiday and maybe even have a Seaside Sleepover? The third instalment of Jacqueline Wilson's bestselling Sleepovers series.