June 17, 2015 12:28 PM EDT

E.L. James’ latest addition to the bestselling Fifty Shades of Grey series hits Kindles at midnight Thursday, and fans are going hard when it comes to pre-ordering. Grey will tell the story through the eyes of Christian Grey himself, offering a “fresh perspective on the love story that has enthralled millions of readers,” according to Amazon.

The online retailer’s latest data reveals that the book is the #1 Kindle pre-order of 2015. Meanwhile, Go Set a Watchman, Harper Lee’s long-awaited follow up to 1960’s To Kill a Mockingbird, is the #1 print pre-order of the year.

It makes sense, of course, that Grey continues to lure digital fans. The erotic series has sold more than 125 million copies since its 2012 release, rivaling Harry Potter and Twilight. And it’s also no surprise the book is an e-bestseller as the series was initially self published online. It also didn’t hurt that readers could enjoy the book in public without advertising what they were actually reading.

Watchman has been a hot topic of debate, with some concerned that publishers were forcing 88-year-old Lee to release the manuscript. The book is set about 20 years after To Kill a Mockingbird, featuring many of the same characters, but specifically Scout and Atticus Finch.

Grey is out June 18 with Watchman set for a July 14 release.

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