Here's an excerpt from the introduction:
Our reasoning proceeds along the following lines. Everyone wants a monopoly. No one wants to compete against his own customers, or against imitators. Currently patents and copyrights grant producers of certain ideas a monopoly. Certainly few people do something in exchange for nothing. Creators of new goods are not different from producers of old ones: they want to be compensated for their effort. However, it is a long and dangerous jump from the assertion that innovators deserve compensation for their efforts to the conclusion that patents and copyrights, that is monopoly, are the best or the only way of providing that reward. Statements such as "A patent is the way of rewarding somebody for coming up with a worthy commercial idea" abound in the business, legal and economic press. As we shall see there are many other ways in which innovators are rewarded, even substantially, and most of them are better for society than the monopoly power patents and copyright currently bestow. Since innovators may be rewarded even without patents and copyright, we should ask: is it true that intellectual property achieves the intended purpose of creating incentives for innovation and creation that offset their considerable harm?
This book examines both the evidence and the theory. Our conclusion is that creators’ property rights can be well protected in the absence of intellectual property, and that the latter does not increase either innovation or creation. They are an unnecessary evil.