I don’t think I’ve publicised this book here yet, which is shocking since I edited it – Advancing Southeast Asian Archaeology 2019 is the proceedings of the last SPAFACON and is available as a free download on the SPAFA publications page. SEAMEO SPAFA has been putting out their publications for free now, and you can go through their back catalog on thier website.
Source: Advancing Southeast Asian Archaeology 2019 | SEAMEO SPAFA