For control system, you may look at modern control by Ogata. That is a nice text book. Generally students follow Gopal, but Ogata is much better according to me. In web you will find the pdf copy. You must also solve problems, because control is all about solving problems. You may look at the IITP control systems assignments at http://tutorialpoint.org/ControlSystems/control.html If you have any more academic query, you could ask me at tutorialpoint.org@gmail.com