I haven't read the novel, so I went into the show with no knowledge of the story, and I won't be able to compare the two. I am currently on episode seven, and though the storyline is decent, I think if the casting choices had been weaker, it would have lost my interest. Luckily, that wasn't the case. Amanda Seyfried's beautiful performance elevates what I otherwise might have deemed Mare of Easttown's less impressive sibling. Her attention to nuances and line deliveries makes what could easily be an unremarkable scene intriguing, and I've found myself very drawn to her character. The young actor who plays Thomas is also great. I look forward to finishing it, and though I fear the threat of predictability, I'm certain I'll still recommend this to people, especially fans of Seyfried. It's a slow-burn, but I haven't felt like I've wasted my time. If you like murder mysteries with layers and appreciate the good-but-flawed heroine cliché, I'm sure you'll like Long Bright River.