Reddit reviews Relentless: Lee Sedol vs Gu Li

There are various books. You could try this one:

https://www.amazon.com/Relentless-Lee-Sedol-Gu-Li/dp/0981912184

and explore some of the related books that amazon sells. Also look at the sites of go publishers such as Slate and Shell, Kiseido, Yutopian, to see what they offer.

I don't know of any encyclopedias like that, but I'm not that knowledgeable. I do know that there are two separate works that independently function as a more in depth look at some specific players and games, namely Invincible, the games of Honihnbo Shusaku and Relentless, the games of Lee Seedol and Gu Li. Kiseido (linked for Invincible) has other English go books that contain analysis of games.