Analysis theory of any random phenomena is known as probability. Main resource for concept of probability is probability theory. Probability theory is said to be one of many most important concepts or branches of mathematics.
This was a decent try for a short introduction to probability theory, but it was not very beginner-friendly. As with the Basics of Statistics Explained from the same series, this one too lacked examples that could have clarified the concepts discussed. It felt a bit like reading a Wikipedia article on the topic - the information was there, but it wasn't easy to digest.
In the audiobook version, the narration was alright - and the first part about the history of probability was interesting.