To conclude, I think the biggest value from reading Nate Silver's book is the introduction of Bayesian theory and the ways to apply this theory in practice. It looks extremely useful in analysing stocks and I am really surprised it is not used more widely. I do not mean a narrow prediction of where the share price will be in one year, but rather analysing probabilities for various scenarios, assessing what assumptions are priced in already, whether a stock has overreacted to new information and so on.
I searched for more resources on the Bayesian theory and did some tests to be sure I had fully grasped the concept. It still looks quite complex and is worth practising this method more.
I would not say this is a must-read book. If you have mastered the Bayesian method, are familiar with the works of Tetlock and Kahneman - then probably this book will add little new to you. Having a very poor understanding of the Bayesian method, I was very glad to have read the book.