By the beginning of the twentieth century, only four known copies of the book survived. Now, thanks to the careful work of Richard Groves, Helwys's "The Mystery of Iniquity" is available in a reader-friendly edition. Groves's introduction sets the document in context, not only as an important and influential historical event but as shedding yet more light on whence we have come.

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.