Mrs. Pollifax and the Lion Killer
Mrs. Pollifax Pursued
Mrs. Pollifax and the Second Thief
Mrs. Pollifax and the Whirling Dervish
etc. You have to go 4 pages in to find something not by Dorothy Gilman. Whoops.
1. It sounds like a hokey premise, and it is, but it works. You want to read them. They're good and short and tasty. Start at the beginning - the books don't really depend on each other, but it's fun watching Mrs. P. develop as a person, and watching history develop - she starts off with combating the Evil Communist Threat - and the secondary characters will make more sense if you go in order.