The book is available for purchase at Lulu.com. Simply type in the search term Saint Lazarus at Lulu.com. The cost of the book is $89.99, which includes a small donation to the Order.

http://www.lulu.com/shop/richard-payatt-and-michael-ross-andcharles-savona-ventura/the-handbook-of-the-order-of-saintlazarus/hardcover/product-23140598.html