Oh, and another set of books... I think about a little girl called Flossie Teacake, (I am only just remembering this now, I could be slightly wrong). I think she could turn into a teenager at any moment, without warning, with funny, and sometimes disastrous consequences.
Also, the Amber Brown books by Paula Danziger.
Used to love The Borrowers series - not so obscure though.
Trebizon (spelling?) Series by Anne Digby, about a girls' boarding school, a bit like Enid Blyton's St Clare's.
Dicey Tylerman books by Cynthia Voyit (sp?). DIcey age 13ish, is abandoned by her mum, who has mh problems. She has to get herself, and her siblings, across America, on very little money. She is aiming to get to her Grandmother's home.
Izzy Willy-Nilly (title?) By the same author, about a teenager, involved in a car crash, who loses her leg.
The Runaways? - Half remembered, about 3 kids who get kidnapped in a caravan? My memories of this one are slightly less reliable!!!