This volume, the first in what is described as a two-volume survey, should be on the bookshelf of any serious economist or any graduate student trying to work her way through a serious first or second year microeconomic theory. It could also be used effectively to teach a first-year graduate or an advanced undergraduate course on asymmetric information and contracts.
What is so nice about the book pedagogically in my view is the way the authors have synthesized so many results by working with variants of simple models. It's the power of elegant simplicity. When looking at moral hazard for example, they start with the simplest two outcome, two action problem, with a risk-neutral principal and agent. Then they slowly and selectively complicate the same base model (e.g. adding a limited liability constraint, making the agent risk averse, allowing for more action levels and outcomes, adding more tasks, more agents, etc). Hence you get the essential insights without being overly burdened from the start with cumbersome notation. They have several nice graphical representations to accompany the very well written intuitive explanations. The end result is that you end up seeing with clarity how many results in the literature, that had previously seemed disparate, tie together very neatly and share a common mathematical structure.
The authors state in the introduction (which is a brilliant historical survey of ideas and the development of the field) that they plan a second volume on multi-agent contracts and mechanism design. It should also be fabulous and will hopefully help to popularize and democratize an area of economics that is packed with essential insights for understanding political economy and the behavior of groups, hiearchies and organizations, yet has mostly been left to mathematical economists.
There are other books out there like Macho-Stadler et al' "An Introduction to the Economics of Information: Incentives and Contracts" and Salanie's "The Economics of Contracts" which are targeted at a similar audience. These are quite good in their own right, but do not have the breadth and insight of this volume.