According to O'Reilly's page (linked from Microsoft's page as the book supplier), the book is now not estimated to be available until July 2014: http://shop.oreilly.com/product/0790145370839.do
I was suckered in by the exam voucher pack, back when the estimated ship date was November. While I recognize that there are other materials available, there are no Microsoft endorsed exam prep books available for this test.
For anyone planning on pursuing the MCSE, I recommend that you wait. If you buy an exam pack with the expectation to use this material, your vouchers will expire before material becomes available.
This is really disappointing if this has been delayed yet again
70-414 is written by the same author as 70-413, which is a disaster.
Looking at past books of the author, he seems to be strong on Java, PHP, Perl and the like, but not server technology. Wondering what prompted MS to pick him to write the book.
I wouldn't rely on this author's books to prepare for this exam.
TechNet, labs, blogs - the most reliable source.
Not terribly concerned about the delay.