To be honest with you, the concept of a coffee table book seems kind of silly to me. However, I think that I found one that I must own.
io9 released some images from Star Wars Storyboards: The Original Trilogy. It shows what the original storyboards looked like. It is amazing to see how they thought the scenes would look as compared to what the movies turned out to be. Also, there are great little tidbits about how they were made. Here is one that the report included:
With artists working frantically to produce tons of images under deadline. The little notes in the margins reveal that Joe Johnston once created 40 storyboards in a single day, as Lucas kept changing his mind about how the Death Star trench run sequence would go — and all the VFX artists were waiting for Johnson to sketch the new version.
Like I said, I am convinced that I need this book. Check out several pieces of concept art below, along with a video promoting the book.