Sorry, gotta disagree.
For $63 + Free S/H -
Bentley Boxster Manual It can save an owner literally thousands $$ in breaking down many procedures the avg. guy can do themselves.
I have the Factory Manuals (all 15 of them), the Factory repair manual, the PET and all the TSB's. But, I still use the Bentley as an easy to use resource. The factory manuals are not as easy to work with, even though they may have more thorough info.
I highly recommend the Bentley, but be aware that they only cover the 986 - ('97-'04).