Though Jonathan Balcombe's new book What a Fish Knows: The Inner Lives of our Underwater Cousins isn't cichlid specific, it does contain cichlid content. Many of you out there might want to consider giving it a read.
I wrote a short post over a year ago about being a conscientious fish keeper. I don't know how much of Balcombe's book is fact and how much is hypotheses, but fish may well be sentient creatures as he describes them. Why fish behave the way they do and how much of that behavior is instinctual versus learned are probably impossible to fully understand or know. We don't even fully understand human behavior. However, I suspect that the book will provide a perspective that most people, much less fish keepers, have never considered. It may also change how some view and care for their own aquarium fish.
The Cichlid Room Companion
Tropical Fish Hobbyist
American Cichlid Assoc.
African Cichlid Hub