First and foremost, the book is free. That’s right, a textbook that is free when every other computer science textbook is easily around $100. Why? I’ll let Remzi make the case. Long story short, publishing a textbook isn’t about making money. It is about sharing ideas. You can download it from the textbook’s website.
Second, the book is by Remzi and Andrea. This pair of professors from the University of Wisconsin is responsible for a ton of amazing storage related research. If you don’t believe me, check out their publication track record.
I suppose I should mention that I have read only very little of the book, but I did push it onto the top of my to-read stack and I’m slowly making my way through it. I’ll let you all know how it goes.