Best-Selling Author’s Novel Ranked Among the ‘Best Books of the 21st Century’ Was Once Banned

More than 20 years after its release, The Curious Incident of the Dog in the Night-Time continues to resonate with readers around the world.

The internationally bestselling novel by Mark Haddon was recently included on Goodreads’ list of the best books of the 21st century based on user votes, further cementing the book’s reputation as one of the most influential literary works of its era.

Originally published in 2003, the novel follows 15-year-old Christopher Boone, a mathematically gifted teenager with Asperger’s Syndrome who sets out to investigate the mysterious death of a neighbor’s dog. What begins as a small local mystery gradually expands into a deeply emotional story about family, trust and independence.

One reason the novel stood out so dramatically upon release was its distinctive narrative voice. Told entirely from Christopher’s perspective, the book offered readers an intensely personal and unconventional view of the world that felt unlike most contemporary fiction at the time.

“As it happens, when I was putting Christopher together I drew upon a long list of beliefs, habits, quirks and behaviours which I borrowed from friends and acquaintances and members of my own family,” Haddon told Penguin. “Which is only to say that Christopher is not that different from the rest of us. It’s the number and combination of his eccentricities which cause him difficulties.”

The novel quickly became both a critical and commercial success, winning major literary awards and becoming a staple in classrooms and book clubs around the world.

At the same time, however, the book also faced its share of controversy.

Over the years, The Curious Incident of the Dog in the Night-Time has appeared on lists of frequently challenged or banned books in some schools and libraries, often due to language, mature themes and discussions surrounding its content, namely perceived references to atheism.

“Christopher is completely unaware of the offence that swearing is intended to cause and therefore it simply washes over him,” Haddon told The Guardian of the novel’s naive protagonist. He suggests some degree of hypocrisy in regard to critics of the book’s contents. “No-one has ever complained that the book is about a mother abandoning her son or that it contains a scene in which a father hits his son.”

Despite those challenges, the novel’s popularity only continued to grow.

Its cultural impact expanded even further when the story was adapted into a highly acclaimed stage production. The theatrical version premiered in London before transferring to Broadway, where it earned widespread praise for its innovative visual staging and emotional performances.

The production went on to win multiple major theater awards, helping introduce the story to entirely new audiences beyond readers of the novel itself.

More than two decades later, The Curious Incident of the Dog in the Night-Time remains a defining modern classic, one celebrated for its emotional depth, originality and willingness to tell a deeply human story from a perspective rarely seen in mainstream fiction.

Its inclusion among Goodreads’ best books of the century reflects just how lasting that impact has become.

Related: Best-Selling Author’s Classic Novel Ranked Among ‘Most Read Books’ in United States on Goodreads