There doesn't appear to be one from the MS Press on this exam.
Check out this book. www.amazon.com/.../ref=sr_1_1 Covers a lot of the material that would be on the exam. Another option is to take the Microsoft Official course for this exam. You can find that information here: https://www.microsoft.com/learning/en-us/course.aspx?id=20341b
If you are studying for your Exchange 2013 certification exams, I would highly recommend these two books. The first is by Tony Redmond and the second is by Paul Robichaux. My second suggestion, learn your PowerShell commands
The link is not working John. Do you have a working link? I am curious which resource to use for my 70-341 exam. Thanks again!
Witch book should be first mailbox or CAS?
I don't believe that exist good book for the exam, but couple of books can help to understand better how Exchange 2013 works. One of the books
Pro Exchange Server 2013 Administration (Expert's Voice in Exchange) 1st Edition
by Jaap Wesselius (Author)
4 customer reviews on Amazon, and that pretty good reviews
Here is the link