Your certification will also no longer be considered valid after the 3 year period. Similar to the CCNA where you will still hold the certification after 3 years - but it will not be considered valid.
I've learned for the CompTIA exams always check their website and the forums to see when the next iteration comes out. I've found book stores and people online selling old books all the time, so you have to watch carefully to ensure you have the most current version / iteration of the book.