If you love Sherlock Holmes, you will love this book. A Study in Charlotte by Brittany Cavallaro is the first in an amazing, 4-book series. I am 100% obsessed.
This story begins when Jamie Watson, the however-many-greats-grandson of Dr. John Watson, ends up at a boarding school with Charlotte Holmes (the however-many-greats-granddaughter of Sherlock Holmes, keep up). The way Cavallaro has entwined the works of Sir Arthur Conan Doyle (famed biographer in this world) into the plot and explained the generations of Holmeses and Watsons since is captivating. Jamie is such a lovable character, and (his) Holmes is intoxicating in her mysteriousness as well as her prickly vulnerability.
There are some more “adult” themes that (if memory serves) are only slightly touched on in the original Sherlock Holmes series (i.e. drug abuse), so just a brief note of caution, a “trigger warning,” if you will: this story does deal with such things as the trauma after a sexual assault and teen drug use (it also has some swearing, Mom). On the whole, I think the subject matter is very well-managed and real without being coarse or insensitive.
If you have an Amazon Prime account, right now A Study in Charlotte is free on Prime Reading, so you can dip your toes into this series without the commitment of purchasing the book — but I am confident you will end up devouring it and immediately stocking your library shelf with the next two books (book 4 comes out in March 2019). This is honestly such a well-written and enjoyable series — I would go so far as to say it is one of my favorites.