Here is a list of all skill trainers in Kingdom Come: Deliverance divided into skills they teach and a list of skill books and tips where they are.
To speed up the development of your hero, you can find skill trainers and pay them for training. You can use them once in five levels and you will get one level in this way. Below you will find a list of skills and corresponding trainers.
There are certain books in Kingdom Come: Deliverance, that not only advance your reading skill, but also increase other skills, depending on the book that you read.
Notes:
II - You can loot it from the first Brawler when you beat him while doing Revenge of the Cuman King quest.
III - You can loot it from unconscious King of the Cumans when you beat him while doing Revenge of the Cuman King quest.
IV - Treasure XXV
I - Fishy Business in Uzhitz quest.
II - Archery master at Rattay Archery Range or you can loot it from the second Brawler when you beat him while doing Revenge of the Cuman King quest.
III - You can loot it from unconscious King of the Cumans when you beat him while doing Revenge of the Cuman King quest.
IV - Treasure XIII
I - Bathhouse proprietor of Rattay Bathhouse
II - Bathhouse proprietor of Sasau Bathhouse
III - It's on a small shelf in the Sasau Monastery fratery (room with Brother Nevlas).
IV - Ancient Treasure II
II - Brother Nicodemus
III - You can find it in the cellar of the Inn in the Glade.
IV - Treasure II
I - Innkeeper of Rattay Tavern (Upper Gate), Innkeeper of Sasau Tavern.
II - Fresco Master in Sasau Lodgings.
III - It's in Uzhitz, in Father Godwin's house.
IV - Treasure X
II - Neuhof Herbalist
III - Herbalist Gertrude
IV - Treasure V
I - Johann
II - Head Groom
III - It's on the shelf in Zora's house in Neuhof.
IV - Treasure XX
II - Huntsman Berthold
III - It's on the table in the small building located next to Talmberg Bathhouse building.
IV - Treasure XVIII
I - Miller Woyzeck
II - Pickpocket one of the refugees near the bakery in Rattay. (?)
III - Treasure I
IV - Treasure XVII
I - Blacksmith in Rattay (the one next to Huntsman)
II - Samopesh Blacksmith
III - Sasau Swordsmith
IV - Treasure VII
I - Miller Peshek
II - Miller Simon
III - Ancient Treasure V
IV - Treasure XXIV (?)
I - Uzhitz Scribe
II - Uzhitz Scribe
III - Sasau Scribe
IV - Treasure XIX
I - Innkeeper of Rattay Tavern
II - Charlatan
III - Rattay Scribe building, upstairs locked in a chest (easy lock). (?)
IV - Treasure XV
I - It can be stolen from the chest in Rattay Refugee Camp.
II - check the comments below :-)
III - check the comments below :-)
IV - Treasure XXIV