Adaptations That Are Better Than the Book, and Why
Fighting words, deployed carefully. "Better" here means the adaptation does something the source couldn't, rather than simply being more popular.
The Godfather (1972)
Mario Puzo's novel is a pulpy bestseller with a large subplot about a supporting character's anatomy. Coppola cut the pulp, kept the family, and turned an airport paperback into a study of how power passes between generations. Puzo co-wrote the screenplay and was reportedly fine with it.
Jaws (1975)
The book contains an affair, a mafia subplot, and a shark that is essentially a plot device. Spielberg removed all of it, made three men on a boat the entire third act, and — helped by a malfunctioning mechanical shark — invented modern suspense by not showing the thing.
Children of Men (2006)
P.D. James wrote a restrained dystopian novel. Cuarón kept the premise of global infertility and built something almost unrecognizably kinetic, structured around long takes that put you inside the collapse rather than beside it.
Forrest Gump (1994)
The novel is a broader, stranger, more satirical book with an astronaut sequence. The film narrowed it to something sincere. Whether you prefer sincerity is a matter of taste, but the film is the more controlled object.
The Leftovers (2014 · HBO Max)
Tom Perrotta's novel is excellent and finite. The show adapts it in one season and then keeps going, and seasons two and three go somewhere the book never attempted — a meditation on grief, faith and unanswerable loss that stands as some of the best television of its decade. Perrotta co-ran the show, so this is less a betrayal than an expansion.
Arrival (2016)
Ted Chiang's "Story of Your Life" is a near-perfect novella built on a linguistic conceit. The film adds a thriller structure around it, which sounds like a downgrade and instead gives the emotional payload a delivery mechanism that works on screen.
The pattern: good adaptations subtract. Almost every film on this list is shorter, narrower and more ruthless than its source.
The reverse also holds. Adaptations that try to include everything produce the four-hour prestige miniseries that respects the book and bores the audience.