There's a nicely-presented list of of “recommended books” to be had on the web: http://www.macrotex.net/texbooks/
The list of MetaFont books is rather short:
Alan Hoenig's 'TeX Unbound' includes some discussion and examples of using MetaFont.
A book covering a wide range of topics (including installation and maintenance) is:
The book is decidedly dated, and is now out of print, but a copy is
sourceforge and on CTAN,
and we list it under “online books”.