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These introductions, handbooks, and practical guides are a good starting point as you begin your journey as a Science Communicator!
Introducing Science Communication by 
Communicating Science by 
Science videos : a user's manual for scientific communication. by 
The Oxford Handbook of the Science of Science Communication by A selection of titles about Creative Non-Fiction; Documentary Filmaking; and Popularising Science
Keep It Real by 
Documentary Filmmaking: A Contemporary Field Guide by 
The Encyclopedia of Writing and Illustrating Children's Books by 