Just published Arizona State Museum Archaeological Series 205 (ISBN 978-1-889747-91-0) A Landscape of Interactions During the Late Prehistoric Period in the Onavas Valley, Sonora, Mexico, by Emiliano Gallaga is the latest publication of the ASM Archaeological Series now available through on-line booksellers, and represents his dissertation done at the University of Arizona. This volume reports on his survey and analysis of site locations and land forms in the Onavas Valley, located in southern Sonora along the Rio Yaqui. It also reports on the changing land use over time in the valley, the groups that seem to be represented in the area and those encountered by the first Europeans into the valley, and the role of the peoples in this area as intermediaries between coastal peoples to the south and west and more inland groups to the north and east. At various times, a number of non-local goods were present and passed through the Onavas Valley, but many details of exactly how, when, and where that was accomplished remain challenges for future work in this understudied area of southern Sonora.