The book ties extremely well String Theory with the rest of (relevant) Physics !<br>String Theories logical link with the rest of Physics is a big reason for the huge number of Particle Physicist (and the like) who strongly believe String Theory is on the right track to unify physics interactions.<br>Starting with gravitation and all the way to strong interactions. (This is what people euphemistically call Theory of Everything)<br>Unlike other authors Prof. Zwiebach is not out to "SNOW" the reader!<br>Instead his approach identifies a near optimal path (Least Action Principle , shall we say) to an (awesomely) accurate and exciting overview of the subject for the aspiring student.<br>I was also extremely impressed  by Prof. Zwiebach's success at covering quite advanced subjects, such as Branes, AdS/ CFT duality and Calabai/Yau spaces.