You can find a lot in Goudy's Type Designs, which he wrote.

Your local library may have a copy of (or be able to borrow) this biography:

http://www.amazon.com/Frederic-Goudy-Masters-American-Design/dp/08109103...

‘The perfect type would be completely invisible.’
‘I consider a type good when it can’t be any gooder.’

Taken from here:
http://classes.dma.ucla.edu/Winter07/155/projects/luca/DMA%20155_frederi...