"The Traitor And the Chalice" is the 2nd installment of the Lyremouth series. In Book One "The Exile And the Sorcerer (Lyremouth Chronicles)" introduces two main characters Tevi & Jemeryl and how they encounter. The main mystery is that chalice and finding it is Tevi's "quest". Who brought it to Storenseg, Tevi's home island? Why stole it? To where? And who stole it? This first book tells us how Tevi got herself into this quest and answers these questions except the last one, which is uncovered in the this installment, "The Traitor and the Chalice".
In Book Two Tevi & Jemeryl work together, without any backup, to solve the puzzle and to find the traitor who not only stole the chalice from Tevi's homeland but also engaged in several deaths. They have no idea what kinds of dangers and troubles they'll face during their investigation and chase. In the land where the ability of performing magic sets the difference among people, it isn't easy for them, especially Tevi, to work and be together. But we can see how they overcome the troubles, albeit some compromise, without losing their faith with each other.
Jane Fletcher has done a good job to bring both mystery and adventure together in one story. She keeps us suspended during the reading of how they find out the traitor and set for the hunt. For this series, it is probably better to read the first two books in order if you want to have better understanding about some questions mentioned above (I think the 3rd one is not connected to the chalice). However, Jane has crafted her works such that you can pick up any book to read and still can catch up the story without too much difficulty.
No matter whether you read the speculative fictions or not, you should try Jane's works. If you have read the book one, you shouldn't miss this one. If you haven't, it's not too late to pick it up, especially that now you can read these two one by one without the wait.