Michael Owens's _The Definitive Guide to SQLite_ is good, too. It's a couple years old, but provides a good overview of both SQLite (standalone, its C API, and a couple wrappers) and the relational model. SQLite's biggest change since its publication is that it now has optional foreign key (http://www.sqlite.org/foreignkeys.html) support.
If you want a more academic treatment, I would recommend C. J. Date's _An Introduction to Database Systems_.
Also, it's been my experience that books which claim to cover relational databases in general, but which actually assume MySQL throughout, are usually pretty bad.
If you want a more academic treatment, I would recommend C. J. Date's _An Introduction to Database Systems_.
Also, it's been my experience that books which claim to cover relational databases in general, but which actually assume MySQL throughout, are usually pretty bad.