Hedgewitch

Dive into this a captivating, standalone, enemies-to-lovers romantasy from the queen of slow burn, Brigitte Knightley, author of the global bestseller The Irresistible Urge to Fall For Your Enemy. 

To be invisible is to be safe. After centuries of persecution, The Hedgewitch Order have hidden the true extent of their powers and cultivated an image as harmless mushroom- harvesters. So it comes as a shock when they learn Lord Breoch is offering a substantial sum of gold for information leading to the capture of a Hedgewitch.

Who is this man, and more importantly, how bloody dare he?

Thalline, quick-tempered and prickly, is nevertheless the only Hedgewitch with enough knowledge of human society to infiltrate his fort. Glamoured as a governess, she goes undercover to take care of Breoch's niece while gathering intelligence. Lord Breoch turns out to be a great beast of a man: tall, stern, foreboding and, to Thalline's annoyance, utterly unreadable because of the mask he wears at all times. But the longer she remains at the fort, the more Thalline is intrigued by him. She begins to suspect that he's just a man in the same way she is just a governess. Thalline may not be the only monster under the bed.

Tropes include:
Black cat x rottweiler
Jane Eyre homage
Slow burn foemance
Espionage via mycological networks
Assassination attempts as foreplay
Keep the mask on