Somogyi's core philosophy is that most modern guitars are "overbuilt"—made too thick and heavy to withstand string tension but at the cost of tone. His book teaches a "delicate balance": The Responsive Guitar - Ervin Somogyi

The book details the importance of the soundboard (top) as the primary vibrating surface. Somogyi discusses:

The book includes nearly 500 photographs and diagrams, plus a 32-page color section showcasing innovative lutherie. Key Concepts in "The Responsive Guitar"