Yes! The Wolfe Security series is a spinoff of the Tracers series. The founder of Wolfe Security, Liam Wolfe, is the main character in the Tracers book Shadow Fall. Jeremy Owen and Mark Wolfe also appear in both the Tracers series and the Wolfe Security series.
All of the books in both series have a stand-alone plot and do not need to be read in any particular order.
No. Each Wolfe Security book has a stand-alone mystery and features a different romantic couple. If you want to read them in order, book #1 is Desperate Girls and book #2 is Her Deadly Secrets.
Shadow Fall is Liam Wolfe’s story and can be read as a prequel to the Wolfe Security series.
Liam Wolfe was first introduced in Shadow Fall, which is part of the Tracers series. In that book, Liam teams up with FBI agent Tara Rushing to track down a serial killer in the Piney Woods of east Texas.
Untraceable, Unspeakable, Unstoppable (novella), Unforgivable, Snapped, Twisted, Scorched, Exposed, Beyond Limits, Shadow Fall, Deep Dark, At Close Range, Touch of Red, Stone Cold Heart… and more to come!
No, they don’t. Each story has a stand-alone mystery plot and each focuses on a different couple, so you can dive right into the middle of the series. Some readers like to read the books in order, though, because the characters overlap.