The Holy Souls Crusade has published several little prayer booklets as a way to help out with funding requirements. Details of each can be found by clicking the small image to bring you to an information page:
 
 

The first book we have on offer is an interview with Maria Simma, an Austrian woman whose life's work was in helping the Holy Souls by passing on their cries for help, prayers and Masses to send them on their way to Heaven. This can be read here on this website.

Fr. Paul O'Sullivan has written two super little books on the Holy Souls and Purgatory which are available to read here:

Read Me or Rue It
How to Avoid Purgatory

This page will be developed further and will offer a list of recommended reading on the whole subject with links to a great Catholic Religious Goods and Bookstore.

Aidan Bond has written a little book about the Holy Souls and it is currently being edited for the second edition. Once printed it will be available from this website, along with others of similar interest.