Printed manuals of AutoCAD 2011 are not available to order. There are PDF files of much of the AutoCAD 2011 docs available for download from this link:
http://docs.autodesk.com/ACD/2011/ENU/pdfs/PDF%20Documentation.html
Also, the complete 2011 docs are available to view online here:
http://docs.autodesk.com/ACD/2011/ENU/landing.html
Tom Stoeckel
Autodesk Product Support
Tom Stoeckel
Technical Lead, AutoCAD Product Support
Autodesk, Inc.