For anybody doing Principles of flight at ATPL level:
I have found this free web resourse 'Text Book' on aerodynamics
it's worth a look, but some of the formulars are a little more errm!
complex than you need for ATPL and more relivant to BSc.
Check it out at:
www.ae.su.oz.au/aero/aerodyn.html
Cheers,