The Invisible Bright - The Halcyon Universe, #3

Miri harbors a secret, and if it comes to light, it may cost her everything. As part of the Ediya Experiments, a group of children genetically modified with dragon DNA, Miri must hide her ability to see emotions in color. But that's not easy when she keeps accidentally altering people's feelings, often with disastrous results. When her latest mistake ends in her losing her job, she's desperate to find a way to control the powers she never wanted. Leo's childhood crush on Miri ended in heartbreak for both of them.
But when she shows up in his hometown, adrift and looking for answers, even wounded feelings can't keep his past love from rekindling. He doesn't understand why she insists on holding him at arm's length. When the two of them witness a shocking crime in Leo's idyllic community, the investigation pushes them together, forcing them to admit feelings they thought long buried. But as they uncover secrets that cast an ugly light on their society, they find their lives unmoored. Miri's powers are more dangerous than she knows, and if she can't get them under control, their future-and the planet-could go up in flames.