HBO's Harry Potter and the Philosopher's Stone is scheduled to arrive on HBO in late 2026 — a ten-year, seven-season plan to adapt each book as its own season. The first trailer dropped at the end of March. I've watched it more times than I'm going to admit.
What interests me is that we're about to have three distinct versions of the same story living side by side: the novels, the Warner Bros films from 2001 to 2011, and whatever the HBO series ends up being. That's unusual. Most famous stories get one canonical adaptation that crowds out the rest. Harry Potter is about to be one of the few works where readers can legitimately debate which medium serves it best.
What the books do that neither adaptation could
The novels are structured around information the reader doesn't have yet. Each book is, among other things, a mystery — who's really behind this year's threat — and the mystery only works because you're spending long uninterrupted stretches inside Harry's head as he puzzles through it. The prose is unhurried. Scenes breathe. Minor characters get chapters of their own.
No film, and arguably no eight-episode season, can replicate that unhurried interiority. Books have time as a structural advantage. They can let you sit with Harry for twenty pages of Dursley-household misery before anything happens, and the misery is the point.
What the films did brilliantly, and what they had to cut
The Warner Bros films hit a specific cultural sweet spot — they came out as the books were being published, so each film was an event that partly belonged to the reader's own timeline. The casting of the central trio was lightning in a bottle; no subsequent franchise has matched that level of audience ownership over child actors growing up on screen.
But the films were also compressions. Whole subplots vanished. House elves got drastically reduced. Peeves the Poltergeist didn't make it in. The entire S.P.E.W. storyline became a joke someone referenced once. By the later films, so much was cut that fans of the books were effectively watching a different story.
The films weren't unfaithful. They were abridged. Those are different things, and the difference is what the new series has a chance to correct.
Why the HBO format could finally serve the books
Eight episodes per season, roughly one season per book, over a decade — that's the premise, and structurally it's the first adaptation that has enough room to actually fit the novels. The later books especially need it. Order of the Phoenix is over 800 pages; the film version had to cut roughly two-thirds of the plot to fit the runtime.
The showrunner is coming from Succession, the lead director also from Succession and Game of Thrones. That's a specific pedigree — prestige television that's comfortable with large ensemble casts, complex politics, and slow-building dread. The Dolores Umbridge arc, handled by a team that understands institutional horror, could land on screen the way it landed in the novel.
The adult cast is where I'm most curious. John Lithgow as Dumbledore, Janet McTeer as McGonagall, Paapa Essiedu as Snape, Nick Frost as Hagrid. These are serious, specific actors. None of them are obvious choices — which is usually a good sign.
What I'm hoping the series gets right
The thing I most want the series to restore is the weird tonal range of the early books. Philosopher's Stone and Chamber of Secrets are children's novels — whimsical, comedic, slightly gentle — and the first two films matched that register. By Prisoner of Azkaban, the films went darker and stayed there, which was partly a response to the books but also a franchise brand decision.
A TV adaptation has room to honor the early books' lightness and still earn the later books' darkness gradually, the way Rowling did. That tonal graduation is one of the quiet accomplishments of the series, and neither the films nor most discussions of the books give it enough credit.
Before the show airs, what to read
If you're planning to reread before the premiere — I am — there's no bad way to do it. Straight through, one a month, is the cleanest approach. One per week works too if you have the time. Reading them as an adult is a different experience than reading them as a kid or a teenager, and worth doing even if you feel like you remember everything. The early books especially reward the reread — small jokes and character beats land differently when you already know where all of this is going.
I'll be writing about the first season of Philosopher's Stone once it airs.