Instructional books by Will Eisner

I got these three books for my birthday:

In short: they are great and very interesting (I'm in the middle of the second book right now). But further I don't want to repeat what Parka has to say about them (I learned about the existence of these books via his blog):

• Comics and Sequential Art
• Graphics Storytelling and Visual Narrative
• Expressive Anatomy for Comics and Narrative