Implementation of Book Organization tool (Python2.[x])

[~km]

> Though many would disagree, I consider XML as a form of database though
> it is only suitable for data exchange. XML is suitable for low- to
> medium-volume purpose and when compatibility with various systems is
> extremely important (nearly any OS and any programming language has XML
> parsers; porting a DBMS system may not be as easy as that).
Thanks for the feedback. I consider XML as not very readable, so I
prefer
a Mark-up language like YAML. Cleaner syntax... but well, that's
personal
preference.

> Python dictionary is stored in memory and closing the program ==
> deleting the database. [...]
My error.. although pickling I would only "prefer" if organizing <100
books.