If you are a horror fan, you probably know the title Never Sleep Again. It’s the name of the definitive, four-hour documentary that chronicles the entire A Nightmare on Elm Street franchise. But if you think you know the whole story just because you’ve seen the doc, think again.

Thommy Hutson, the writer and producer behind that legendary documentary, has returned to Springwood with his book, Never Sleep Again: The Elm Street Legacy. Released in time with the film’s 40th anniversary, this book isn’t just a transcript of the documentary—it is a surgical deep-dive into the making of the 1984 classic that started it all.

Here is why this book deserves a spot on your shelf (or in your Kindle library), and why you shouldn’t sleep on it.