Books non fiction:
Dearest Pet: On Bestiality by Midas Dekkers https://www.goodreads.com/book/show/1205367.Dearest_Pet
Evolution’s Rainbow by Joan Roughgarden https://www.goodreads.com/book/show/1523436.Evolution_s_Rainbow
Uniquely Dangerous by Carreen Maloney https://www.goodreads.com/book/show/39650575-uniquely-dangerous
Dog Love by Marjorie Garber https://www.goodreads.com/book/show/839101.Dog_Love
Wet Goddess by Malcolm J. Brenner https://www.goodreads.com/book/show/7994499-wet-goddess
Loving Animals: On Bestiality, Zoophilia and Post-Human Love by Joanna Bourke (Expected publication: November 5th 2020) https://www.goodreads.com/book/show/52612671-loving-animals

guides:
The Other End of the Leash: Why We Do What We Do Around Dogs by Patricia B. McConnell https://www.goodreads.com/book/show/119723.The_Other_End_of_the_Leash
ANIMALS as Sex Partners by Edwin Harris ?

memoirs:
Growing Up In The Orgone Box: Secrets Of A Reichian Childhood by Malcolm J. Brenner https://www.goodreads.com/book/show/38747319-growing-up-in-the-orgone-box
The Horseman: Obsessions of a Zoophile by Mark Matthews https://www.goodreads.com/book/show/1205372.The_Horseman
Sleeping with Dogs: A Peripheral Autobiography https://www.goodreads.com/book/show/18736958-sleeping-with-dogs

book fictions:
Bear by Marian Engel https://www.goodreads.com/book/show/187044.Bear

Studys:
Understanding Bestiality And Zoophilia by Hani Miletski https://www.goodreads.com/book/show/1205370.Understanding_Bestiality_And_Zoophilia

documentaries:
Animal passions directed by Christopher Spencer https://www.imdb.com/title/tt0847467/
Donkey love Directed by Daryl Stoneage https://www.imdb.com/title/tt1982102/

Movies:
The death of dick long directed by Daniel Scheinert https://www.imdb.com/title/tt9356952/

Plays:
Awkward Conversations with Animals I've Fucked by Rob Hayes https://www.goodreads.com/book/show/23830462-awkward-conversations-with-animals-i-ve-fucked
The Goat, or Who is Sylvia? by Edward Albee https://www.goodreads.com/book/show/40107.The_Goat_or_Who_is_Sylvia_

not necessarily zoo but still cool:
My Dog Tulip by J.R. Ackerley https://www.goodreads.com/book/show/97472.My_Dog_Tulip