Igor had no hope at all for the Spirit Book; he didn't think of it as a golden finger.
However, the Spirit Book seemed determined, insisting that Igor must look at it with new eyes.
It's quite difficult for someone to prove themselves. After all, you might think you're remarkable, but others might not see it that way, they might even think you're just a fool...
Take Igor as an example right now; he thinks the Spirit Book is a bit silly, always emphasizing how important its abilities are, yet fundamentally it hasn't brought him any help.
Igor is still struggling to listen to Perkins' story. Such a story with a broad span is hard to clarify, but Igor not only needs to clear the story's trajectory but also gets the whole story straight, and then analyze its logical consistency and so on...
All these tedious and complex tasks have to be done by Igor himself; the Spirit Book hasn't helped him one bit.
That's why he sneers at the Spirit Book.
