“Filthy Animals,” by Brandon Taylor (Riverhead)Brandon Taylor’s “Filthy Animals,” a book of interconnected short stories, is a chronicle of pain, identity, recovery and the desperation we all feel for human connection.A depressed and lonely man recovering from a suicide attempt finds himself caught in a love triangle with two dancers in an open relationship; a group of teenagers unable to control their emotions resort to brutal violence against one another; a young woman battles a terrifying