In her debut novel “Wylding,” Amy Liptrot’s heroine left London for a northern Scottish island. In her new book, it’s the opposite: she returns to the city jungle, hoping to deal with loneliness and find her love. But even in the city—this time it’s Berlin—she becomes absorbed in a deep study of local fauna: armed with binoculars, she searches for Berlin hawks, crows, and raccoons. Through tracking signs of wild nature in a big city and online dating with men, the main pulse of this candid autofiction novel unfolds.