I think Chapter 1,2 & 3 there are some text missing from the chapters: Ex: Chapter 3, Page No: 20, Errors that will not be revealed from the Trial Balance: There is no text after that.
That is because the Lecture Notes are to be used with the lectures – they are not meant to be a Study Text. It is in the lectures that we work through the examples and expand on them – the blank spaces are for you to fill in as you listen to the lectures.