I read the book over the weekend and it's a great, fun read. Unsurprisingly, there's nothing revelatory but it's cool to see how the fourth season could potentially play out with this extra character making a variety of different decisions that effects the outcome, many of them ending with Hawkins completely destroyed and everyone killed.
The POV character is a high school student at Lenora High who happens to witness El's first public bullying from Angela (involving the diorama). From there, the character either steps in to help her or goes to Hawkins for a journalism conference hosted by Fred Benson (the second victim). The character is a bit of an asshole and generally pretty suspicious, but in the more positive timelines, they are helpful in fighting against Vecna and/or Jason. The character meets just about everyone and follows down just about every story thread with the obvious exception of the Joyce/Murray/Hopper storyline (which makes sense considering the character is a high schooler).
Aside from the more devastating endings, there are two big divergences: One, where because of the involvement of the POV character, the Lenora group goes to Suzy sooner (having avoided the attack at the Breyers) and quickly gets to the desert bunker where El. As a result, Sullivan isn't able to track them down and El's progress in recovering her powers happens quicker, which leads to everyone to going to Hawkins directly to fight Vecna. The downside is that this large divergence with its multiple endings (the character joins three different groups as part of the attack) conclude in broad strokes and quick summations.
The other big divergence is when the POV character joins everyone in Hawkins (after a slight detour with Jason and initially betraying Lucas) which leads to Max's initial possession occurring inside of Eddie's trailer instead of the cemetery. As a result, she rises directly through the first gateway, forcing Vecna to release her because he's unable to create another gateway (he even acknowledges that she was
suppose to go to the cemetery). This changes their plan of attack...but still ends in disaster.
There's also one timeline where the POV character themselves is possessed in direct reaction to them calling Vecna "just a human" (or words to that effect) and Vecna feels insulted by this claim. He corrects this statement by telling them "he's a god" before releasing them. The curious thing about this possession is that nowhere throughout the entirety of the book does the POV character suggest that they're suffering from any kind of trauma, which was a clear goalpost for Vecna.
Overall, it's a fun read but I was frustrated by a few minor points. Like I mentioned before, the narration disappointingly concludes quickly whenever there are any big divergences in storylines and instead, the longer passages focus on the POV character's role playing out differently within the confines of the actual fourth season. There are also several endings that just simply end for the sake of ending, even though there's still plenty of story to tell before disaster strikes (either because Jason figures out you're in league with the "cult" or because Vecna's traps are closing in). I get that the book didn't want to stray too far from the main narrative, but I love good "what ifs...?" and I really wanted to see more details of the wider divergences.
All of which makes me wonder if the Duffer Brothers had any involvement or insight into the development of the book, and possibly didn't want the author, Rana Tahir, to accidentally or prematurely reveal any season 5 plot points.
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On a lighter note, as part of Netflix's Geeked Week, this behind-the-scenes video was released:
No hints for season 5 but it's still cool to see some of the props and costumes, as well as learning just how many damn practical vines they use for the show!