This is book 44 in the series. You will want to read the first short story, The Gathering, for the background information on the Muir witch before you start the rest of the series. After that, each one can be read as a standalone.
I really enjoyed Jack and Callie’s story. Callie is looking for the man that she thinks has taken advantage of her late mother. What she finds is very different than what she expected. Soni has given Jack his turn to leave the Moor and fulfill his good deed. One that he has waited almost 3 centuries to do. On their journey Jack and Callie learn they can find happiness in the oddest of places.