Manga history! This should really be read by everyone.

The manga doesn't really have an overarching story, but rather just a collection of stand-alone chapters. However, these chapters can be really long, like half a volume long. I would recommend reading all of them but it can be a bit of a drag sometimes since not all stories are especially interesting. One of the real essentials is one of the few real arcs, "Once Upon a Time" spanning volume 6-8. The arc is also a good example of the darker side of the manga. The stories are often about the nature of humanity, violence and war. There's usually a lesson to be learned at the end.

The art style is childish, but it really is excellent. Tezuka has a really cinematic style and is great with shadows. The characters are also great but unfortunately most of the main characters just don't get enough development or relevant screen time. My favourite characters were Astro Boy himself, and his creator Dr. Tenma. Dr. Tenma is not a good guy but he's not fully evil either, he's a very morally grey character. Dr. Tenma doesn't appear that often, but whenever he does, it's a highlight. The one-off characters are also really great, and all have their own back story, motivation och development.

Unfortunately the manga overall is very up and down. I think for younger children it doesn't really matter, but for an adult some chapters don't really leave an impact.