Francis has made the plight of migrants one of the hallmarks of his papacy, denouncing what he called the "globalization of indifference" toward people desperate to flee poverty and persecution.
The fraudsters sell the tickets for as much as 4,000 pesos (US$216).
Part of the sales will finance a children hospital.
The book, "Dear Pope Francis," is out March 1 from Loyola Press in Chicago.
Pope Francis will be making an unusual visit to Prison No. 3, which used to be a center and symbol of gang power.
Roman Catholic Church officials in the U.S. said the Diocese of Ciudad Juárez is the official distributor of tickets for the Papal Mass on Feb. 17 and will be giving a limited number of tickets to El Paso parishes for the open-air Mass.
Government officials in the State of Mexico said 10,000 state police officers will be assigned to keep the peace at a 5.5.-mile (8.8 kilometer) motorcade and rally on Feb. 14.
When reminded about his visit to Mexico, Pope Francis did something unexpected.
He also called to the end of the "arrogance of the powerful."
Syria and Libya are of special interest.