The Outlook Address Book is a collection of address books or address lists, created from your Outlook contact folders. If you use Outlook with a Microsoft Exchange Server account, your Address Book list will include the Global Address List (GAL). The GAL contains the names and e-mail addresses of everyone that has an account with that Exchange Server and is configured automatically by Exchange.
Before we start we should figure out why the MOBI books display in "Docs". We know that the Docs category is used for storing personal documents like PDF, HTML, TXT or other documents sent by Amazon "Send to Kindle" service. Some MOBI ebooks are added personal document tag when generated so that the Kindle Fire will recognize them as documents but not ebooks.