What is the summary of the book Season of migration to the North?

As Joseph Smith showed interest in limited geography theories in Meso-America and because current archeological evidence overwhelmingly points to Maya and Inca civilizations being the most advanced civilizations in ancient Americas, most Mormon scholars have long focused on Central and South America. One book compiled by prominent Mormon scholar John Sorenson has more than 500 pages of plausible location theories placing the Book of Mormon events everywhere from the Finger Lakes region of the Northeast United States to Chile. However, all theories acknowledge that there are no existing landmarks that will identify, without dispute, the places in the Americas portion of the Book of Mormon narrative. The Old World narrative portion has proven much more fruitful for Mormon scholars where there are only two separate, but overlapping theories on the sites described in Lehi's journey to the Ocean, and the identification of locations, such as Nahom, that most Mormon scholars consider to be a confirmed location .