As usual with academic books published by university presses, many of these only had a short print run and IF you can find them are liable to be hideously expensive. I suggest trying a library first! *grins*. The Braswell book is pretty much deemed THE book on the subject of Maya/Teotihuacán interaction, and Sugiyama one is probably the most up-to-date in terms of sacrificial burials and current thinking on militarism.

BRASWELL, G.E (ed), The Maya and Teotihuacán: Reinterpreting Early Classic Interaction, University of Texas Press, 2003.

SUGIYAMA, SABURO, Human Sacrifice, Militarism, and Rulership: Materialization of State Ideology at the Feathered Serpent Pyramid, Teotihuacan, Cambridge University Press, 2005

SANDERS, W.T and MICHELS, J.W. (ed.), Teotihuacán and Kaminaljuyú: a Study in Prehistoric Culture Contact, Pennsylvania State University Press, 1977.

PASZTORY, ESTHER, Teotihuacán: An Experiment in Living, University of Oklahoma Press, 1997

STOREY, REBECCA, Life and Death in the Ancient City of Teotihuacan: A Modern Paleodemographic Synthesis, University of Alabama Press, 1992

RATTRAY, EVELYN CHILDS, Teotihuacan: Ceramics, Chronology and Cultural Trends, Direccion General De Publicacions, 2001