Free from the author('s republishing consortium) via KDP Select @
Amazon:
The New, Thinking Annabel by Alan Davidson, a kids/YA novel in a series about a plucky young girl who gets into humorous difficulties, from the looks of it, originally out from Armada in 1985 (probably a Penguin imprint, since there are later editions out from their Viking and Puffin imprints).
Annabel's in big trouble at school but when a book on 'problem behavior' drops at her feet, it proves inspirational. In its pages she meets the wayward Betsy-Lou - Case History No.36 - her 'transatlantic cousin'. And Betsy-Lou can help her..... An even bigger thinking challenge comes along when she has to prove to Kate's father that she can be trusted at the seaside if she's to go on holiday with Kate. That she is, indeed, a very sensible person.
More hilarious episodes from the life of thirteen-year-old Annabel Bunce.