The last wish, because its the first time i am introduced to book Geralt.
Or the time of con...something( i dont know how the name translates into english basically the fourth book, because one particular chapter(it will be a spoiler if i tell you which one and why), but i dont know, things might change. I am on the sixth book( the tower of the ... something again with the transation thing reason) i am yet to read the seventh book and the season of storms.