This is probably the 2nd best contemporary opening book I've read (I don't compare contemporary opening books with those from the icons of the past - needless to say, it was an entirely different time and chess culture then). It is certainly the only book I've been inspired by enough to review. What are we looking for from an opening book in today's day and age of 3000+ rated engine analysis at our fingertips? Well, one thing we're NOT looking for is simple regurgitation of what either our engines or our databases can provide to us at the click of a mouse. We're looking for human guidelines in these openings, concepts to latch onto, the correct approach (attitude, viewpoint, philosophy), how to employ our style in the position, handle a mess in a manner that doesn't require tightrope walking that only a computer could do - things like that. In short, we're looking to gain the kind of understanding that still separates us from players better than us; those things that keep the chess hierarchy in place in spite of the much heralded technological democratization of our improvement tools. We're looking for someone not to stop their instruction at a label like "unclear" or "with advantage"; we're looking for wisdom about how to proceed in such situations. And these are precisely the things that Kotronias has so generously shared with his readers in this book. As a KID player, I know those painful defeats where it feels like I didn't do anything wrong but my opponent effortlessly puts the game in the bag, and I've searched high and low for comfort from the literature - I've read or skimmed probably every KID book there is, from the pioneer Efim Geller's series to the recent stuff - and nowhere did I find what I was looking for until now. Thank you Vassilios for not only giving me what I was searching for in the KID, but for reaffirming once again my love for chess itself. Now, in case this review left anyone wondering which opening book could possibly top Kotronias' for me, well, I'm happy to lift the suspense: that would be my #1 favorite opening book of all time, a timeless masterpiece whose place atop my rankings perch will never be shaken, The 3...Qd8 Scandinavian: Simple and Strong, by yours truly, also available on Amazon. Kidding aside, in writing my book I think I was guided by a similar philosophy to Kotronias'. I hope readers will think so too!