The author, Peter Woit, is a long term critic of string theory. His wikipedia page should give you an overview of his background. https://en.wikipedia.org/wiki/

The author, Peter Woit, is a long term critic of string theory. His wikipedia page should give you an overview of his background. https://en.wikipedia.org/wiki/Peter_Woit https://en.wikipedia.org/wiki/Peter_Woit