I have really mixed feelings about this book. On the one hand, I loved the storyline with Jarrett - it was so richly told and sketched an era of time I don't know much about, from a perspective that is not given much air time. I found the deep diving into 1860s horse racing incredibly fascinating, and I really enjoyed the science aspect of the modern-day storyline. But basically everything else about the modern-day storyline bothered me. Brooks completely forces Jess and Theo together - they have really no chemistry, and I don't really believe they'd have a romantic connection after she had a racist reaction to seeing him standing over what she thought was his bike - and their clashes about their differing backgrounds and perspectives feel incredibly ham-handed and forced. The ending is also completely abrupt, ridiculous, and useless, and really left a bad taste in my mouth.