Welcome to the witcher library guide!
This is a quick guide created specifically for the busy witcher who has little time left for reading after roaming the countryside chatting up complete strangers and dealing with their various and sundry monster troubles. The Witcher game is no different really in its portrayal of Geralt's day-to-day routine. He still goes around talking to people and slaying monsters. Special thanks go to Licensed Luny for the many, many hours of research it took!
In the course of the game, Geralt gathers journal entries about the various monsters he encounters and the ingredients he can extract from them. He also passes by many potentially useful plants, so knowing about as many as possible also helps make his life easier.
Most of these journal entries can be obtained by speaking with NPCs, but a few can not be obtained in any other way than by reading the appropriate book or scroll. Luckily, many books and scrolls can also be obtained for free, or as rewards for completing quests. That said, there are still a few wiley entries for which no free source exists. To date, that list of entries seems to be:
Below are the books which are necessary to obtain in order to have a complete set of journal entries. After all other means of acquiring the information have been exhausted. Strictly speaking, although some entries can be had for free, their availability earlier in the game is often preferable. Technically, you may want to splash out a bit more to make sure you have all the necessary Bestiary entries before starting a new chapter. For that information, see the list of monsters by Chapter.
The following books are necessary if you want to have every single journal entry available. Otherwise, it could be said that no books are necessary.