Books

[The_Green_Man]

I have the ability to make books and have three in my storehouse but how do they get moved to the geologist skill tree to improve their abilities?

[lulu10093]

http://prntscr.com/1fj1r4 click that on geologist

add them on what bits you want then confirm selection as below

http://prntscr.com/1fj1ve

[Fexno]

Click on your geologist while he's not out discovering something.

On top you see 4 images, the most right one allows you to access the skill tree of that geologist, and allows you to add books to improve his abilities.

The other 3 are the amount of books already invested in this geologist.

[The_Green_Man]

I can see three tomes on the right hand side of the tree but when i do to the tree itself and click on the two available options it says"book type unavailable" is this because I only have tomes and not codex

[Fexno]

Well since you didn't know yet where to find the skill tree, I would say you need manuscripts. (top left image in http://prntscr.com/1fj1r4 )

[lulu10093]

yep you need manuscripts 1st for few levels
then tomes
then codex

[The_Green_Man]

that's the answer then, been making tomes instead of manuscripts, will change my production and that should get things moving. Thanks everyone.