The best book I have read about information warfare is about to be published in English as The Dark Sides of the Internet. I read it in Swedish (Internets mörka sidor) when it came out earlier this year.
I would say that the book is written in a manner that makes it accessible to virtually anyone interested in the subject while at the same time not being too shallow. It provides fascinating insights into information warfare in practice during recent wars and conflicts.
The author of The Dark Sides of the Internet is Roland Heickerö, Associated Professor at the Swedish National Defence College (SNDC). His research examines different aspects of information warfare and cyber threats. Between 2003 and 2012 he was Deputy Research Director at the Swedish Defence Research Agency (FOI) in charge of cyber defence research.
The Dark Sides of the Internet is about to be published by international academic publishers Peter Lang and here is the publisher's info about the coming book.