Alan Root’s autobiography Ivory, Apes & Peacocks is a wonderful recollection of his filmmaking plus early adventures in the Aberdares. He describes introducing Dian Fossey to her first mountain gorillas, and behind the scenes of the Oscar-winning Serengeti Shall Not Die. The book is available via Amazon UK or in select gift shops in Kenya, including Tortilis Camp in Amboseli.
Cynthia Moss’ best seller, Elephant Memories : Thirteen Years in the Life of an Elephant Family, will give you her first hand observations and clues to their behavior.
Katy Payne’s research into the infrasonic communications of elephants is described in Silent Thunder: In the Presence of Elephants.