Update: I bought this volume:http://www.paxbook.com/algorithmiS/servusPrimus?iussum=monstraScriptumEditum&numerus=20647
Unlike most eastern liturgical texts from Pax Books, this one comes handsomely bound with an amazing leather cover and beautiful end papers, and gold leaf around pages. The postage was ridiculously expensive, but book plus postage came in at less than $100. It was worth it: the book is a brick (668 pages) and has everything you could want on the Coptic catholic liturgy. For an almost 700 page, handsomely bound liturgical book, 100 bucks is a bargain.
It's "only" in Arabic and Coptic, but if you have either Church Slavonic or Greek, Coptic is actually quite easy to get your head around. I definitely recommend this handsome volume for any student of the Coptic rite who has an affinity for languages.