This book provides an overview of the positions an corresponding plans arising from the Ruy Lopez and Italian Openings. This learning method was developed by the author enabling the chess player to understand any structure that is derived from both opening set-ups. There are plenty of interesting and worthwhile tips so it's definitively a book worth buying as a part of a general study of king's pawn openings. GM Matthew Sadler, New In Chess Magazine 02.2019.