Okay so I see where the confusion comes from—'Ruin' isn't a standalone title, it's the third book in John Gwynne's 'The Faithful and the Fallen' series. It follows directly from 'Malice' and 'Valor'. The plot is basically the massive, sprawling war between the God-War's two sides coming to a head. The Bright Star's champions, led by Corban and his crew, are on the back foot after some brutal losses in the previous book. They're trying to rally what's left of the loyal realms while being hunted by the forces of the Black Sun, led by that absolute nightmare Nathair and his scheming ally Queen Rhin.
A huge chunk of the book is the buildup to and the actual siege of Drassil, the giant fortress in the forest. It's this relentless, claustrophobic sequence where alliances are tested, heroes are pushed to their absolute limits, and betrayals come from places you really don't expect. Characters you've followed from the start… let's just say not all of them make it out. The 'Ruin' of the title isn't just about castles falling; it's about lives, hopes, and certain moral certainties getting shattered. Gwynne really doesn't pull his punches here.
What I love is how it balances these huge, epic battlefield chapters with really intimate character moments. Cywen's arc, Maquin's relentless quest for vengeance, Veradis's crisis of faith—they all get their due. The pace is just breakneck, but it never feels like it's sacrificing depth for action. You're just glued to the page, heart in your throat, especially during that final stand.