For a film with ambitions to spawn sequels and a companion television series, The Dark Tower feels surprisingly self-contained, but the Easter eggs, hat-tips and references are there if you know where to look.
Just as the titular skyscraper is the centre of the universe, Stephen King's sprawling saga lies at the core of his body of work and shares DNA with many of his bestsellers.
No doubt with this in mind, The Dark Tower is riddled with references to the horror master's weird and wonderful creations. At times, it's blatant and ties in with the movie's overarching plot but at others they're more subtle.
The movie was 10 troubled years in the making and hasn't enjoyed the greatest reception from fans and critics, with many taking aim at the decision to cap its runtime at just over an hour and a half, leaving little potential to explore the depth and complexity of King's characters and settings.
It isn't all abject negativity, though. The consensus is that Idris Elba excels in the role of the gun-slinging Roland, while newcomer Tom Taylor impresses as Jake Chambers.
And this batch of cool Easter eggs will no doubt appease a few of the avid King fans...