Anti-recommendation: be aware that the story comes from r/rational, and takes some inspiration from stories like Harry Potter: Methods of Rationality; personally, I think that The Reckoning doesn't has the same writing problems HP:MoR had; to me, the characters feel diverse and compelling and close to their canon counterparts, and none of them really feels like an author surrogate. But a few people have said the characters felt different in a way that put them off (Tobias in particular is pretty close to being an OC sometimes), so... keep an open mind, I guess."You know who does have brains, though?” Marco continued. “The Yeerks. Maybe a thousand of them already. A thousand human brains, a thousand slaves, except those slaves can’t even think without their masters knowing about it. There is nothing standing in their way except us—did you get that? This isn’t some movie, where humanity’s going to rise up and pull some bullshit trick out of its ass. The Yeerks are winning. Did you not see Elfangor get eaten? Do you not understand the stakes? He was coming to destroy the planet because he thought that might be the only way to stop them."
Anyway, I highly recommend it to anyone looking for Animorphs fanfics (and even people who never read Animorphs in the first place). There are infrequent updates, but so far it looks like the story will be completed, and every new chapter is definitely worth the wait.