Hello 789asd
One of the books that come with matlab is the "getting started" book. It is a short book (about 100 pages), and can be very helpful. If you want to go further with Matlab, there are other books. Usually those books exist inside the Matlab directory in PDF format. If you want help about a specific topic, you can type in the command window "help <topic>" or "doc <topic>", or just the "help" and "doc" commands.