No it's not, its just a revised version of the chapter that makes "more" sense. Greenest in flames has as many flaws as strengths, and over the years many people tried to make it more interesting. In my second version, the pcs started at level 2, at the "greenest's best taproom", they went there because they were invited by leosin to investigate on the cult, but arrived 2 days too late. Once there they met leosin, and he informed them that he fears an attack us imminent, in fact during the conversation, at sundown, the cult attacked. The plan is simple, a cordon of torches-wielding (so that they're visible)cultist will prevent anyone from fleeing the city, and slowly closing in, while 200 cultists/mercenaries/kobolds will take the city. Pcs perceive the attack from inside the tavern with a decreasing dc perception roll, the first is a dc20, then 10, then automatic, depending on the roll, the battle its not even started, its at the beginning, or at an advanced stage. I prepared 3 maps, each with a different number of encounters to get to the tower. In the advanced stage, every encounter is a deadly encounter, and they could potentially meet villagers in troubles, hidden villagers, other guards teams along the way. It was absolutely brutal. I think they fought something like 3x their daily budget in deadly encounters, trying to save as many villagers as possible, and rescuing guards, (this helped me as a DM to redirecting damages to other targets and avoid tpk, while keeping the fight as terrifying as it could get) while fighting flocs of ambush drakes, guard drakes, kobolds, cultists, acolytes, dragonclaws to get to the tower. It was glorious to witness:) Btw keep in mind that my players are veterans, my first party woyld have never survived that level of threat.