there are sections of mathematics where 2+2=5... I think it's called Lobachevsky's mathematics :)
According to the guide, he runs to 121 for gold, a level-up, and to clear a path. It's not profitable to return for the book - and there's no money - buying meat is more important.
We and Javdet have already discussed the skill tree in detail... regarding Jebus, you can easily buy the book, visit the stable, and then run...
Стримы и обучение тут:
https://www.youtube.com/channel/UCWlnXU5R5RLCMuWzIpBc65Q