This guide was invaluable to us on our regretfully short tour of St.Petersburg. We would read it before touring for background and descriptions of the places we visited. The book is worth having for detailed illustrations of the layout of the Hermitage,Peterhof,PushkinPalace, Yusupov Palace...It is a portable guide even with the color illustrations (i.e.not heavy). Comes with it's own bookmark, too! Highly recommended!