I use Audible daily to listen to business books, management books etc. I have no personal books on my account. Is the fee deductable for my real estate business?

According to the IRS, if you used it exclusively and regularly for business, then YES it is deductible.  You would list it under memberships/fees.

How about for military reservists?  Or active duty military? 

Also, would Adobe pro be deductible for military reservists?