All Fours, by Miranda July

The New York Times–bestselling author of The First Bad Man returns with an irreverently sexy, tender, hilarious, and surprising novel about a woman upending her life. 

A semifamous artist announces her plan to drive cross-country, from LA to New York. Twenty minutes after leaving her husband and child at home, she spontaneously exits the freeway, beds down in a nondescript motel, and immerses herself in a temporary reinvention that turns out to be the start of an entirely different journey.