3 Questions for a new Real Estate Investor

[Daniel Lang]

Still getting my start in investing and I have some questions:

1) If you are buying a multifamily property and it already has tenants, is the current landlord required to turn them over to you, 2) How do you hold security deposits during the life of the lease?  Do they go into a specific bank account? 

3) As you expand your portfolio (getting a bit ahead of myself but I'll ask anyway) does every building require a separate bank account? 

4) Also a 4th question I've thought of, what books would you all recommend?  I've read Brandon Turner's books, I've read David Greene's book on long-distance management.  Anything else to recommend?