Christopher P. Baker is author
of Moon Handbooks: Cuba as well as the award-winning
Costa Rica Handbook.
Detailed information from his Moon
Handbooks: Cuba on "Getting into Cuba" is
available online at http://www.moon.com/travel_matters/hot_off_the_press/into_cuba.html.
This same information is available
However, this information is from Baker's 1996
book, and more current information can be found in his updated version
(ordering information below).