Yes, many of the sections of Infocenter are available as PDF downloads.
However, PDF's on your local system aren't updated as often as Infocenter
(if ever). And LOTS of new stuff keeps getting updated in Infocenter when
IBM comes out with new stuff in PTF's, TR's, etc. So, going that route
may get you current for now but again leave you trailing in the dust as
time goes by.