So says the Legion of Christ:

In an effort to distance itself from the wrongdoings of its founder, the Legion of Christ has recently circulated an internal memo detailing how a long venerated work of spirituality attributed to Fr. Marcial Maciel was actually a slight re-writing of a book from a little-known Spanish author.

“El Salterio de mis días” (The Psalter of my Days), according to the Legionary tradition, was regarded as written by Fr. Maciel during the period of the “great blessing,” (1956-59), when the Mexican founder was submitted to a canonical process by the Vatican that was finally called off.

The memo now reveals that the text, very popular among the Legion in its original in Spanish and partially translated into English for internal use, was “based” on the little known work of a Spanish Catholic politician, Luis Lucía.

There’s more at the CNA link.