What defines an "extensive library"?


Rules Questions


I'm gearing up to run a pathfinder AP, and within that AP there are a considerable amount of Library's. However they range in size from just a few books to many thousands. The bonus Range seems to max out at +4. However it started me thinking about how big a Library must be in order to qualify for Untrained use. The following rule is all I have found so far regarding this topic.

Pathfinder Core Rule Book pg 100 wrote:


Untrained: You cannot make an untrained Knowledge check with a DC higher than 10. If you have access to an extensive library that covers a specific skill, this limit is removed. The time to make checks using a library, however, increases to 1d4 hours. Particularly complete libraries might even grant a bonus on Knowledge checks in the fields that they cover.

Now I guess my question is what constitutes as a extensive library for the use of a knowledge check untrained and unlimited for the DC check limit? Any one know a good source of reference?

Another question I have is there any guide lines as to what a single book can be used for? Such as a holy text to a god. Can a character use this text to get a knowledge religion role as it pertains to that specific deity? Would applying a Maximum DC to such books be a way to note a difference in quality. This book only provides a untrained Religion Check for X God, and it is limited to DC 15 for purposes of knowledge gained by the PC. If the PC has Knowledge Religion this book provides a +1 bonus to knowledge checks pertaining to X god.

Thanks in advance for any information.


my definition of extenisive library would be that the library has books that are detailed on the area the library sits as well as copies of various holy texts of the regional deites, history texts of various nearby villages, towns, cities, local heroes, historical accounts of the country, and propoganda writings agsint others.

also they don't have to have just books, but scrolls as well, even scrolls of arcane discoveries.

Grand Lodge

Mr. Green wrote:

I'm gearing up to run a pathfinder AP, and within that AP there are a considerable amount of Library's. However they range in size from just a few books to many thousands. The bonus Range seems to max out at +4. However it started me thinking about how big a Library must be in order to qualify for Untrained use. The following rule is all I have found so far regarding this topic.

Pathfinder Core Rule Book pg 100 wrote:


Untrained: You cannot make an untrained Knowledge check with a DC higher than 10. If you have access to an extensive library that covers a specific skill, this limit is removed. The time to make checks using a library, however, increases to 1d4 hours. Particularly complete libraries might even grant a bonus on Knowledge checks in the fields that they cover.
Now I guess my question is what constitutes as a extensive library for the use of a knowledge check untrained and unlimited for the DC check limit? Any one know a good source of reference?

At minimum, the library should have more than one book that addresses the field of knowledge (skill) that the character is researching. Checks with higher DCs might require a larger library to consider it "extensive".

Mr. Green wrote:
Another question I have is there any guide lines as to what a single book can be used for? Such as a holy text to a god. Can a character use this text to get a knowledge religion role as it pertains to that specific deity? Would applying a Maximum DC to such books be a way to note a difference in quality. This book only provides a untrained Religion Check for X God, and it is limited to DC 15 for purposes of knowledge gained by the PC. If the PC has Knowledge Religion this book provides a +1 bonus to knowledge checks pertaining to X god.

It makes sense. I agree it should still require a skill check to find the information among all the religious phrasing (unless the book in question is something like the "Placard of Wisdom").


The GM.

Scarab Sages

If it's a small library, the GM has fun picking amusing titles, or running one of the many generators that can be found on the Net.

It's an extensive library, if the players ask what's in it, and you think "**** that, I'm not listing the whole inventory.".


An example of an extensive library would be all the Pathfinder books by Paizo. A particularly complete library would have a majority of D&D books.

Liberty's Edge

Mr. Green wrote:
I'm gearing up to run a pathfinder AP, and within that AP there are a considerable amount of Library's.

Which AP are you running? I'd like to take a look at it.


DemonicEgo wrote:
Mr. Green wrote:
I'm gearing up to run a pathfinder AP, and within that AP there are a considerable amount of Library's.
Which AP are you running? I'd like to take a look at it.

Carrion Crown

Community / Forums / Pathfinder / Pathfinder First Edition / Rules Questions / What defines an "extensive library"? All Messageboards

Want to post a reply? Sign in.
Recent threads in Rules Questions