GoGameGuru-dot-com (domain taken over by spammer) was a website dedicated to promoting go. From about 2013 to 2016, they also distributed go books/equipment internationally, and even published at least one original book (Relentless: Lee Sedol Vs Gu Li).
Unfortunately, after they closed their store in Dec 2016, they never resumed making additional content, and as of recently, their webpage seems to be down. I miss this website. It was reliable place to buy a large variety of books and equipment, and they had nice articles, problems, and commented games.
Does anyone know what might have happened to them?
They have released some of their commented games and go problems via GitHub under an open CC license:
Some more information on their Sensei’s Library page: