A really excellent book both on specifics of using FileMaker Pro V9 and on some of the most basic and important general principles of sound database design, basically targeted to the needs of developers rather than database users.
Very useful outlines of solid, basic principles are provided for:
Nearly every area of importance to automating a FileMaker application is also covered succinctly and clearly:
relationshipsgraph and it's relation to underlying table/file structure
Feiler writing strikes a very good balance between parsimony and detail. The well-written text, together with excellent organization and indexing makes this book an excellent reference for a working FileMaker developer