recommendation

[MathematicalPhysicist]

can someone please recommend to me a free text (preferabely in pdf or ps format) about Celestial Mechanics?

[Greg Bernhardt]

http://aa.usno.navy.mil/colloq180/Proceedings/klioner1.pdf
http://www.aimath.org/WWN/varcelest/varcelest.pdf
http://www.ima.umn.edu/talks/workshops/10-29-11-2.2001/kasting/kasting.pdf
http://www2.ess.ucla.edu/~newman/siam.pdf

[Lonewolf]

http://astrowww.phys.uvic.ca/~tatum/celmechs.html

The chapters are all available to download as PDF files. Some are still being written. My only gripe with the book so far is a lack of problems.