You can purchase and download the interactive ebook version via Forward Chess for $19.99.

The text includes in-depth analysis of key games from elite players, including: (1995) Aronian – Gelfand (2014) Ivanchuk – Jakovenko (2010) Karjakin – Lysyj (2014) Where to Access

by GMs Igor Lysyj and Roman Ovetchkin is a definitive opening guide for Black players looking to counter flank openings like 1. c4 and 1. Nf3 . Published in 2017 by Chess Stars , this 444-page book focuses on the "English Hedgehog" formation, a complex and strategically rich setup. Core Content & Strategy