During a Google search PhD student Luke Auld-Thomas found a Lidar remote sensing survey of a portion of the Mexican jungle which he was able to analyse to reveal a huge hidden Mayan city dating from the C8th.  He was able to decipher a large city plan of houses, causeways and plazas with pyramids.  Luke named the newly discovered city complex Valeriana.

We have several books on the Mayans for sale. . . . . 

The Ancient Maya

Mayan Terracottas

The Mayan Gods

Les Mayas au pays de Copán

Yucatan and its Archaeological Sites

Yucatan and the Mayas: Merida-Uxmal-Chichen Itza-Palenque

The Lost World of Quintana Roo: An Adventurous Quest for Mayan Ruins on the Untamed Coast Yucatan

Yucatecan (Mayan) Built Quetzalcoatl Facades

Marvels of Copan: A Handy Illustrated Guide

Palenque: Official Guide