There have been countless books written about Earth Changes, below you will find a list of some of the current authors. However, I think you would enjoy what Howard West has to say on Earth Changes; you will get a taste by watching this video for the E-Book, Locked Gates and after that you may consider buying the inexpensive E-book, Locked Gates by Howard West.
Earth Changes, Erik Poltorak, Zecharia Sitchin, Whitley Strieber, Robert Felix, Linda Moulton Howe, Marshall Masters, James McCanney, Dr. Roy Spencer, Mac Tonnies, Peter Ward, Dr. Jack Pruett, Apocalypse, Climate Confusion, Planet-X, Comets, Earth Changes, Nibiru, iceagenow, Global Superstorm, The 12th Planet