Find your tribe in a Sea of Creativity
Book 7 gave me nightmares as a kid about getting taken by Norbert the Nutjob and sold into the Viking slave trade and I was petrified of Bearcub's grandma
we always specify the difference between the earlier books and the later books in the HTTYD franchise as "books 1-7 are whimsical, fun child fantasy and books 8-12 are absolutely fucked" but... i don't believe that's true.
the later books are consistently fucked up and complicated and mature and wonderful and tend to leave me with tears in my eyes. the early books trick you into believing that they're fun children's stories and then jumpscare you with the most messed up set of paragraphs you've ever read in your entire fucking life AND THEN just pretend like nothing ever happened.
the books all take place in the same universe, the same fucked up, horrible world. the early books are through the lense of a child who hasn't yet grasped how fucked up the world is, who hasn't been exposed to the fuckery yet. the later books are through the lense of the same child who has now been burdened with Knowledge. once you have the context of the later books, the earlier books start to make too much sense. and holy fuck do they get a lot darker upon reread.
the books are all completely fucked up. the only difference is the consistency at which the books are fucked up.
you know what book seriously messed me up as a kid? book 2. DEAR GODS BOOK 2.