You probably received the Hypatia Sans Pro font family either with Creative Suite 4 or as part of a registration incentive for Creative Suite 4 or one of its component programs.
Note that what Adobe gave you was a license to use the fonts on the same system on which you installed the software that entitled you to these fonts.
It terms of licensing, Hypatia Sans Pro allows for embedding the fonts in PDF, PostScript, and EPS files. You are certainly free to use the font for any publications you produce as long as the font is not distributed outside the publication itself. For example, you can produce a publication-ready PDF file for print or the web with these fonts embedded in the PDF file, but you cannot send the fonts themselves, outside of the PDF file, to your publisher.
Good luck with your book and enjoy use of these fonts.
- Dov