There are a few different conventions, with the Sybex ones being an "almost" match to Mathematical Logical Operators. More common in computing environments is to use the C Logical Operators.
The fact that different authors uses different symbol sets is confusing, but the symbols are not the important part. The underlying way that the operators are used tends to be much more consistent. Your focus should be on understanding what the words mean. For example, how does "exclusive or" differ from both "and" and "or"?
Keep in mind that the CISSP is a "Mid-Career" management-level certification. You unlikely to find trivia questions on it. The things that matter are knowledge, experience and your ability to apply both.