A series, turn of the century? I'm looking for a YA or children's mystery book I read in the 1990s, though I'm not entirely sure that's when it was published. It was from a series, and this particular book was about a wealthy girl who solved a mystery while on vacation in Europe. It may have taken place around the turn of the century? It wasn't a popular series and the book itself was thin; I think I probably got it at Zany Brainy (if that's of any relevance). The cover was hand drawn, I think featuring the protagonist in a garden of some sort? Hoping someone remembers this!