Madam Guyon (1648-1717) was imprisoned for seven years for writing books about intimacy with God. But while in prison, she kept writing, then when she was released she traveled and taught people methods of effective prayer, and drawing close to God.
This TWO BOOK volume contains her collected letters that were published, and her method of prayer.
Many editions of these books are selling at high prices (since you only get 50-80 pages; and if more, then few words per page!), but both books have been combined into one to save the reader money.
Yet, the type is reasonably large, 12 points. 14-point type is considered LARGE PRINT.