Grab a textbook and take a look at it. If you look at it carefully, you will also see that they follow a certain line so that we can learn the concepts in a simpler and easier way. However, we can also skip some topics, in the event that we consider it necessary.
Let's take an example. We started to study a textbook, but there are some things that we already know and it is not necessary review. In this case, we have the possibility to skip these topics and, thus, finish earlier. On the other hand, we can also read more time those aspects that we do not know.
The question is what if we start at the end? It is clear that many books allow us to do that, since what they teach us may not be related. There are even some documents to review a lot of concepts, also giving us various opportunities that we can take advantage of in the way we want.
It all depends on how the books are. If you want to do what we are talking about, it would be best if you first give it a global look to the book. So you can get an idea. It is clear that there are some that we will have to start at the beginning, because if we do not we will lose very important and completely necessary knowledge and concepts.
In the end, the decision is yours. But, in any case, we encourage you to put into practice, on occasion, this way of study. We would not be surprised if you find out new ways of doing things or learning what you like the most.