wetdogjp writes: "I recently became a high school teacher, and I've inherited three classes with no textbooks! While two of my classes are introductory in nature, one for computers in general and the other for networking, the third class should prepare juniors and seniors to enter the workforce and start a career in computers. We have some older textbooks by Heathkit available, but the newest of them are four years old. Do Slashdotters have any favorite textbooks that can help kids on their way to becoming junior sysadmins, programmers, networking professionals, etc.? Would you suggest books to prepare students to take certification tests such as A+, Network+, or others? Any textbooks we use would need to cover quite a breadth of material, such as PC hardware, operating systems, networking, security, and more."