The first book of an Elly Griffiths series, The Frozen People, is a fun romp into time travel crime solving. Set in England, it's a thoroughly-built world of dimensional characters with interesting conversations. I liked how visceral it felt to be back in time, through Griffiths' carefully chosen details. It was fun that the main protagonist is in her 50s! The genre is mystery but didn't feel formulaic. Not all the murders/disappearances get resolved, but we were warned of this on the cover: "Some murders can't be solved in just one lifetime." It's well-positioned to be a successful series. Here are some quotes:
"Did he?" Ali fills their wine glasses while telling herself to be careful.
"Yes. He remembered meeting you at that reception. He was asking about your job. I said you were a police officer and he asked if I ever worried about you being in danger. I said that you were only working on cold cases."
"So cold they're frozen." Ali finishes the line.
Page 121: "Objects can have strange powers," says Templeton. "Don't you think? One has heard of cursed mirrors, of books that will kill you if read in a certain light. I suppose it's natural that one invests inanimate things with life. If a man sits in a chair all his life, will that seat not retain something of him?"