The One Who Eats Monsters by Casey Matthews: Really stuck with me, interesting world building that grabbed me and didn't let go and fun narrator. Can be very violent though.
Percy Jackson and the Olympians by Rick Riordan: The Titan's Curse: my favourite of the PJO series. Great pacing, fun humour and action. A bit shorter than the other books, but everything has a purpose.
Iron Heart by Nina Valera: the sequel to Crier's War. Character development continuing from first book is amazing and so sweet and feel great to watch. The story keeps you hooked as well. Dual pov and it really adds to it.
The Rise of Kyoshi by F.C. Yee: a book in the world of Avatar the Last Airbender, but you only need to know some basics to enjoy the book. Really adds to the world building of the show and the character of Kyoshi, makes her 3 dimensional. More than that it's a nice romance and found family with action and lots of twists.
Of Ice and Shadows by Audrey Coulthurst: sequel to of fire and stars. Interesting world and magic system, and a relationship you want to see more of along with the individual characters. Two povs and each is interesting and distinct.