Kinsey Millhone is a fictional character who was created by Sue Grafton for her "alphabet mysteries" series of novels. Millhone appears in a number of short stories written by Grafton. Grafton's mystery novels featuring Millhone are set in 1980s Santa Teresa, a fictionalized town based on Santa Barbara, California.
the first letter of the first book kinsey millhone appears in is "A"
The Alphabet Series titles are in alphabetical order, thus the first appearance would begin with A