Some of the guys from EEVBlog found this great EE eBook called Analog SEEKrets by Leslie Green.
http://www.thetan.plus.com/seekrets/index.html
It is out of print due to lack of sales - so Leslie Green is giving it away and hoping for donations
It is a great resource learning about analog components and component selection for manufactoring.
So it is a very practial resource and I think it is absolutely worth a read for anyone!
and remember to donate!