For me the Harry Potter series is nostalgic. I remember reading Harry Potter when they were first published. For me Harry Potter and the Chamber of secrets, has been the turning point when the book started getting darker. The first book had it's share of tense moments, but The Chamber of secrets really gets more into the gore of it. The theme of friendship and comrodery are still there, along with some lighter moments. But you can really get a sense of the rising tension of Lord Voldemort still being present. The terror of what is lurking in the Chamber, the growing panic amongst the students and staff with continuing attacks on children. The them of of discrimination amd the separation of caste that the some purebloods have against those that are of mixed magical and muggle families really starts to appear in the second book. The Chamber of secrets is the launching pad for what is to come in the future books. Reading it as an adult and after watching thr movies, it's interesting to compare the two and to pick up on things that my younger self missed when I first read. Still a really solid book series that continues to still enchant readers of all ages.