Which Harry Potter Installment Sells Most To New Readers Today?

I feel like the fourth book, 'Goblet of Fire', was a turning point in length and complexity, and its sales reflected the series hitting a new level of mainstream craze. But did it outsell the first? Probably not over the full timeline. It was the 'this is getting serious' book for many readers and the point where the audience solidified from kids into a broader age range. Its sales are monstrous, but likely still second-tier compared to the foundational first volume.

It's almost impossible to get exact, broken-down figures because publishers rarely release that granular data, and a lot of it gets bundled into 'lifetime sales' for the whole series. We know 'Philosopher's Stone' has the highest lifetime sales because it's been in print the longest and is the entry point, but the later books had record-shattering first-day sales that the first book couldn't dream of. The 20th anniversary house editions from Bloomsbury created a whole new sales spike for the early books, effectively reselling them to existing fans. Meanwhile, the audiobooks narrated by Stephen Fry and Jim Dale have probably been repurchased multiple times by people upgrading from CDs to digital downloads. So the 'edition' story isn't linear; it's layers of different formats selling to overlapping but distinct groups over two decades.