The Gentleman's Guide to Vice and Virtue

 The Gentleman's Guide to Vice and Virtue by Mackenzi Lee, 513 pages.

Henry "Monty" Montague is a known rake, known for an overindulgence in drinking, gambling, and general carousing with people of all genders. The next year is meant to be the best of his life, as he embarks on the Grand Tour across Europe with his best friend Percy, who he's been in love with for years, and his little sister, who they are meant to be dropping off at finishing school in France. A year seeing the world with his abusive father a continent away sounds like a dream come true and Monty is determined to enjoy it, even if at the end he has to leave Percy in Holland and won't get to see him constantly anymore. However, when one of Monty's impulsive actions turn their tour into something from an adventure novel things get more dangerous than he had ever expected. 

This is an extremely fun book. As much as Monty can be insufferable and self-centered at times, he is still absolutely a sympathetic character who goes through a lot of growth over the course of the novel. That being said, I liked almost all of the supporting characters more than Monty himself, and watching them interact was a lot of fun. I believe this is the first novel I've read about the Grand Tour, but it's practically made for a fun adventure like this.