Outside of minor revisions most of the information is well enough and up to date for studying for the exam. Be sure to read as much as you can find in the bibliographies as web based sources tend to be the most up to date information. Sources such as anything having to do with the NIST or other US Federal Government will always be up to date. Same with encryption, things like that.
Last keep in mind that all books are considered 6 months out of date from publication. Hence the reason to keep up to date with the bibliography. Just be prepared to occasionally know two sets of facts and what year they may have changed. For example OWASP Top 10 is updated every 2-3 years and often changes slightly. Know the basic changes to the year in case you see a question or two that looks wrong but just out of date. This is true of all IT based exams.