Here and Now and Then by Mike Chen.

It’s 2142 and Kin Stewart is a time-traveling secret agent, tasked by the UN time police to go back and stop criminals and mercenaries from trying to mess with the past for personal gain. When a mission goes wrong, he is stranded in the 90s, and left to start a whole new life. Eighteen years later, his rescue team arrives and he must leave everything he knows, including a wife and beloved daughter. As he tries to reconcile his pre and post 2142 life, he must decide what he wants from life and what would be best for those he cares about.

“Time travel is one of those classic sci-fi themes that I never really get tired of and Mike Chen tackles it fabulously by mixing sci fi, family drama, and a bit of existential crisis. This book asks not only what you do when you’re a time traveling secret agent stuck in the past, but what happens when your rescue finally shows up 18 years later?” -- Natalie