After a chaotic summer that nearly broke her, Izzy Brown is ready to play it safe. No more murders, conspiracies, or near-death experiences. Just Christmas in New York with her best friend Elton Jones-Davies, her dysfunctional family—and zero drama. That is, until an infamous ex-NFL player is stabbed in The Bronx, and the world turns upside down.

The victim? Mustang Jones—Elton's estranged father. The suspect? Pretty much everyone. From angry investors and spurned lovers to bitter former teammates, the line of people who wanted Mustang dead stretches from Manhattan to Pensacola. But with Mustang in a coma and the police going nowhere, Izzy does what she does best—she starts digging.

As the case grows colder and the pressure builds, Izzy begins to unravel. Haunted by guilt, burdened by secrets, and slipping into habits she swore she'd left behind, she risks losing more than the truth. Because some damage can't be undone—and sometimes, the truth destroys more than it saves.

Set in 2009 during the Great Recession and the first wave of the opioid epidemic, Brother Island is the fourth book in the Izzy and Elton Mystery Series.