Little House series
Anne of Green Gables
St Clare books
Would also recommend the S.T.A.G.S. series by M.A. Bennett for a more drawn-out thriller/mystery. The Cheerleaders by Kara Thomas is also a really good thriller.
I'd also recommend the Inspector Chopra series by Vaseem Khan and the D.I. Marnie Rome series by Sarah Hilary. They're technically adult thrillers/mysteries but I've been reading them throughout my teens so may as well suggest them.
Also, I know The Good Girl's Guide to Murder series by Holly Jackson is a very popular YA thriller. I've not personally read it myself yet but it's another suggestion.
So The mortal instruments series, infernal devices series, dark artifices series, and the last hours series