Someone Else's Shoes by Jojo Moyes

Sam is feeling overwhelmed with life right now. Her husband, Phil, is struggling with depression and is out of work, while her boss, Simon, demeans Sam in front of other employees and is just looking for a reason to fire her. When Sam accidentally takes the wrong bag at the gym that contains a pair of red Louboutin heels, she finds herself feeling empowered. The owner of the shoes, Nisha, is furious that someone has taken her bag, which also contained a Chanel jacket. On the day that she lost her bag, Nisha was also dumped by her wealthy husband, Carl. He cuts her loose with no money and nowhere to live. Nisha is desperate to get back her shoes and some semblance of her life. Someone Else's Shoes recounts the lives of Sam and Nisha as they try to find happiness for themselves.