How to find the name of a book
I would really appreciate any help at all in trying to find a book from my childhood. I don't have a any of the important information e.g. author or anything from the title. I believe it was series of books. The outline of the book was a boy and girl who solved crimes/mysteries. One of the two was an artist and upon arriving at a mystery or crime scene would sketch a picture while the other asked questions about what happened. The reader would then have a number of clues and a detailed sketch in which to try and figure out what happened... I read this book somewhere between 1985 and 1990 but have know idea of when it was originally published. I know this isn't much to go on but I have to try... Thank you