However, remember that you do not have to reinvent teaching or your class in one quarter. Textbooks contain errors which you should point out to your students before they read over them. Even the best overall text is probably not the strongest in every area of the course. Technical texts especially are about five years behind the cutting edge by the time they are published. Other texts can be good sources of additional information and explanations.
Trade journals can provide many interesting and relevant articles to discuss in class.
We have found the test banks that come with most books unsuitable. Most seem written by people who, though literate, are unfamiliar with the material. We would be embarrassed to ask some of the silly questions we have gotten from test banks. Create policies before the first class to cover as many bothersome situations as you can think of such as missing quizzes, turning in assignments late, cheating, class attendance, unauthorized collaboration, etc. Eventually, almost anything you can think of will happen.