I have the Following books
CCNA voice Official Exam Certification guide By Jeremy Ciora ( and others?)
CCNA Voice quick reference By Michael Valentine
I have read both books. I recently started doing the Boson CCNA voice practice test and also the Practice questions on the Cisco web site.
I am a bit concerned that I am coming across many questions that these books have little to no information on. I have been able to google these terms to get more information.
Here are a few terms that I was not able to find much about from the books. Please Keep in mind I am not saying these are not mentioned at all but there is little if any information on the following. Also these are my notes not the full name for these terms. I am not looking for explainations to these terms but is there a better book I should be reading to prepare for the CCNA voice exam?
isdn bind-l3(bakc haul)
Microsoft Active Directory
Message settings Cisco Unity Connection
INE has made their CCNA voice Bootcamp available free to stream. I'm not sure if that is still going on, but that would be a great addition for your studies. Also, CBT Nuggets with Jeremy Cioara is really great. All the best!