He is the author of Tying Headbands or Venus Appearing: New translations of k’al, the Dresden Codex Venus Pages and Classic period royal binding rituals (British Archaeological Reports International Series, in press) and The Maya Calendar Correlation Problem (in Calendars and Years II: Astronomy and Time in the Ancient and Medieval World Oxbow Books, Oxford, 2010). The Apotheosis of Janaab’ Pakal: Science, History, and Religion at Classic Maya Palenque was first published in 2007 (University Press of Colorado) and then released in paperback in 2010.