Where can I find information on what happened between the events of the last book and the first game?

I'm sure this question has been asked and answered numerous times but it's been a difficult search.

I just finished *The Lady of the Lake* and I was expecting it to cover Yen and Geralt's first run-in with the wild hunt and stuff. I haven't played the first game, just read some synopses, so maybe it's explained there but I wouldn't think so because of the amnesia. The Witcher 2 explains it a bit but a lot of it is still very unclear.

Does anyone know of a good resource where I can get the straight dope on what happened to Geralt, Yennefer, and Ciri between the end of the last book and the beginning of the first game? Even if its just an explanatory video or article that would be great. I mean I was expecting Letho to show up at some point in the last book if that gives you an idea about my confusion.