Double fianchetto, it means the set-ups with g3, b3 for White and g6, b6 for Black, as a repertoire for both colors. The first half of the book is devoted to White pieces. Most place takes the double fianchetto against the King's Indian and Gruenfeld's Indian, which was by the way popular set-up of players like Vladimir Kramnik or Ulf Andersson. The other half of the book is devoted to Black pieces. The book contains 62 annotated games. The second picture shows content with an overview of the variations that the author discusses. Daniel Hausrath is a German Grandmaster who plays the Double finachetto systems throughout his career for about 25 years. Further information about the book and a sample are available at thinkerspublishing.com.