a good book on the parallel axis theorem in a more general nature would be Marion and Thornton's Classical Dynamics (or Goldstein's book)
Beer and Johnson's Statics and Dynamics for Engineers offers a lot of examples, problems and answers on parallel axis theorem, inertia, and other aspects of mechanics.
also -- i tend to check the comments part of http://grephysics.net
multiple times a day. if you post there, i should be able to answer your question faster (in general). (also, future test-takers with the same problem would not have to google search for alternate solutions and clarifications if all elements of the problem were concentrated in one place.)
fyi: the top 10 latest comment postings are listed on the frontpage of the site (it's right below the MetaSearch). i'm working on interviewing some others to be authorized moderators on the site, so that questions might be answered within the hour.
jax wrote:Thanks a lot ! I didn't post on the other site because I thought nobody would notice it (unless they happened to check the solution to that question after I posted). I did not learn much about moments of inertia or the parallel axis theorem in my undergraduate studies, so this question really confused me (and it seems that I can only find very basic explanations / formulas for the parallel axis theorem).