An open book: what makes a great film adaptation, from The Shining to Trainspotting

Adaptations can provoke fierce debate because readers bring private visions of beloved books to the cinema. Successful screen versions do not all follow the same formula: they may be faithful, selective or boldly reimagined, but they find a clear dramatic purpose for the changes they make.

High-profile literary adaptations have become cultural events that many people attend as much to take part in a wider conversation as to see the film itself. Recent releases such as Christopher Nolan’s The Odyssey and Emerald Fennell’s Wuthering Heights, and recurring revivals of classics like Sense and Sensibility, have prompted public debate before and after screenings, underlining how adaptations invite comparison with private readings of their source texts.

Audiences rarely leave a film saying it matched exactly what they had imagined on the page. More often the response is frustration: complaints about a changed ending, simplified themes, apparently odd casting choices or the perceived mistreatment of cherished characters. High-profile missteps are singled out precisely because so many viewers have long-standing attachments to the original material.

Yet there is no single route to a successful adaptation. Some films hew closely to plot and detail; others distill a novel’s themes and reshape its material to suit cinema; still others use the source as a springboard for something new. Classics often cited in discussions of adaptation, from The Shining to Trainspotting, demonstrate that both fidelity and invention can yield powerful results when guided by a clear creative purpose.

What unites the more successful screen versions is an understanding of what the source text does best and what film can do differently. Adaptors must decide which elements to preserve, which to compress or omit, and when to alter events or characters in service of tone, pace, or visual storytelling. Fidelity to the letter of a book is a choice, not an obligation; fidelity to its emotional or thematic core is what many critics and viewers ultimately value.

Adaptations will continue to polarise because they sit at the intersection of private imagination and public art. Filmmakers who respect the spirit of their source while exploiting the distinct tools of cinema tend to give audiences something that feels both recognisably derived and legitimately fresh. In that balance — more than in strict adherence to plot — lies the most productive path to a great adaptation.