Both Yennefer and Geralt are dead at the end (or at least there is serious question as to how / where they are when the saga ends). Geralt is killed by a mob of rioting peasants and a vicious pitchfork stab to the stomach, and Yennefer dies trying to save him ... pushing herself beyond all limits to use whatever magic she can in that effort. Of course, something else happens after that which does leave a /tiny/ bit of wiggle room in the theories about whether or not those two are in fact dead or alive, but nothing is definite.In the game, the action takes place after that (nearly) last scene in the novels. So based on the novels, the last anyone heard was that BOTH Geralt and Yennefer are dead. That's why everyone is so shocked to see Geralt up and around.Now some people have complained about this exact fact, saying that it's silly to resurrect Geralt ... so i imagine those people would be even more peeved to see both of them resurrected
However, CDPR had to start somewhere, and using /the/ hero from the books made the most sense. anyway, staying reasonably true to the books was their intent (i think!)