d3dc9a39_Aircraft_Design_Spring_2002__ophy___generally_very_readable
Engineering Analysis of Flight Vehicles [John D. Anderson] Holt Ashley [WCB/McGraw Hill] Dover Publications, Inc.
Handy, inexpensive general reference; Somewhat dated (1974) but the fundamentals haven't changed
Aircraft Design,Spring 2002
Airplane performance and design philosophy - generally very readable