Recs if you like Up in Flames...

The Sadenverse is a shared universe spanning multiple series by Saxon James and Eden Finley, both individually and co-written. There’s no single “correct” reading order, but some books contain minor spoilers depending on where you start. With over 25 books (and more on the way), a suggested reading order exists, though it doesn’t follow publication dates. Whether you dive in randomly or follow the guide, the Sadenverse offers a vast, interconnected world to explore.

MM books where there are flames - literally - and tension! (one of the mains are firefighters)