This was fun.
I had read the first book, where Mack turns amateur investigator through the traditional genre method of being accused of murder and having to clear herself. Mack has crossed senses, or synesthesia – she tastes sounds and hears touch. She had suppressed and ignored it for years, and now she has friends who will help her figure out how it works.
And she’ll solve crimes with her ‘bloodhound’ skills. Only not very well, because there’s more to detecting than finding clues, but she’s learning. And the detective who is helping out is kind of hot.