"A Typeface is the Formal Manifestation of the Authors Voice".
I have started reading this book called Designing Type - Karen Cheng. This is suggested by Tarun and is a very technical book. Its talks about Latin type design specifications. How can you enhance your type and how different types of types follow a certain language of construction is laid out in detail.
While reading this book, I can see that it is important to break the grid for balancing the letterforms visually. I would like to come up with a similar book on indic scripts, which explains the technical details of enhancing your typeface aesthetically as well as technically, for the future type designers.