An Elderly Lady is Up to No Good by Helene Tursten
An Elderly Woman Is Up to No Good is charming and funny and a reminder not to underestimate elderly women.
Maude is an 88-year-old Swedish woman with no family or friends, and she's quite happy that way. Maude enjoys doing things on her own, including traveling and solving problems.
Maude kills people, annoying neighbors, an antiques dealer, people who present potential disturbances to her peace. She's cunning and intelligent and not vain. She's perfectly willing to use the disguises and tools old age provides; pretending to be confused at times or hard of hearing, neither of which she is; using a cane or walker, neither of which she needs. They make her appear less capable - and dangerous - than she is. Maude is quite a likable character though, in spite of it all. Just don't become one of the "problems."...