Don’t forget your college alumni magazine. They probably have announcements of alumni achievements or even book announcements. I graduated from Mills College in Oakland and they were happy to add the publication of “Baker’s Dozen” to the class notes.
Also, think of neighborhood associations that are looking for announcements. Join organizations that will promote your book. For example, I’m a member of Sisters in Crime. They have a newsletter that promotes books written by members. Give it a think and utilize every resource.
Don't discount a neighborhood give away. My book is near a Bill Bryson book!!!