Complex sentence: They have been cited in some pseudoscientific books such as "Atlantis Rising" by David Lewis, and Don Patten, another young-Earth creationist, has emerged as their staunchest supporter.
Split into simpler sentences: They have been cited in some pseudoscientific books such as "Atlantis Rising" by David Lewis. Another young-Earth creationist, Don Patten, has emerged as their staunchest supporter.