Logic Pro Users Guides and Manuals
Update Feb 27th 2016
The Logic Pro X 10.2.1 User Guide can be found here...
http://help.apple.com/logicpro/mac/10.2.1/
The updated Logic Pro X 10.2.1 Instrument Guide (including the manual for Alchemy), can be found here
http://help.apple.com/logicpro-instruments/mac/10.2.1/
The updated Logic Pro X Effects Guide for 10.2.1 can be found here..
http://help.apple.com/logicpro-effects/mac/10.2.1/
Additional: Updated iBooks versions are available via the iBooks Store
Update: August 26th 2015
The newer Logic Pro X 10.2 User Guide can be found here...
http://help.apple.com/logicpro/mac/10.2/
The updated Logic Pro X 10.2 Instrument Guide (including the manual for Alchemy), can be found here
http://help.apple.com/logicpro-instruments/mac/10.2/
The updated Logic Pro X Effects Guide for 10.2 can be found here..
http://help.apple.com/logicpro-effects/mac/10.2/
Additional: iBooks versions are available via the iBooks Store
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The newer Logic Pro X 10.1 User Guide can be found here...
http://help.apple.com/logicpro/mac/10.1/
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The online Multi Language version of the Logic Pro X 10.0 User Guide can be found here....
http://help.apple.com/logicpro/mac/10/
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English Language PDF versions of the User Guide and Additional Manuals, can be found here
Logic Pro X - User Guide Jul 16, 2013 - 84 MB
Logic Pro X Instruments Jul 16, 2013 - 22 MB
Logic Pro X Effects Jul 16, 2013 - 13 MB
Logic Pro X - Control Surfaces Support Jul 16, 2013 - 4 MB
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User Guides in other languages can be found here