[sdiy] (OT?) FEEDBACK as a topic in electronics, music, science, etc?? BOOKS?

[dan snazelle]

Maybe this is off-topic, but I am looking for ANY book recommendations (or websites) on  the topic of FEEDBACK  
( could be anything from video feedback to neural networks to guitar feedback to servos to a book on FM  oscillators)

COULD BE an IDEA book or a technical book

just trying to LEARN and make some new connections between ideas



thanks!!!!