I like to think of the introduction to a book or magazine as something that gives you a glimpse of what to expect in the rest of the publication, the way the entranceway to a house might give you an idea of what to expect in the rest of the house. You get a sense of how the place is decorated, the tastes of the author of the house you are about to enter. It's theory, and there's definitely a fair amount of relatively hard-core theory happening in Tessera.
Theory is something which is often appealing only to other theorists.
To continue the house analogy, there are rooms in Tessera that were definitely not decorated by any theorist. There's a series of black and white photos with brief, hilarious descriptive narratives. Despite his remarkable history of being struck by moving objects, Bloom developed an unreasonably high degree of optimism and became a successful motivational speaker. Tessera is full of an eclectic and wonderful assortment of images and words. It's more like going into a mall than a house.