[en] Elongated Skulls of Peru and Bolivia · the Path of Viracocha Brien Foerster

[en] Lost Ancient Technology of Peru and Bolivia Wiley-Blackwell

[en] Aftershock · the Ancient Cataclysm That Erased Human History Wiley-Blackwell

[en] Aftershock Dar el-Machreq Publishers

[en] Lost Ancient Technology of Egypt Cambridge University Press