For readers of The Da Vinci Code, John Allen's book on Opus Dei may be something of a revelation. One opens it expecting to find at the very least GPS coordinates pinpointing albino monk training camps. Or perhaps full disclosure of untold wealth flowing through offshore bank accounts. Instead one finds exhaustive research, interviews and careful analysis that reveal a group alive with ideas and purpose, but a bit short on sinister plans. Removing the sense of mystery surrounding Opus Dei may not serve future thriller writers well, but the journey is fascinating in its own right. Allen's biography of Opus Dei is also necessarily a brief biography of Saint Josemaría Escrivá, born in Spain in 1902, whose vision of the sanctification of work gave birth to Opus Dei, or "The Work" as its members call it. The idea of finding sanctification through work was not original to Escrivá, but the power of his vision certainly brought it to a fuller realization within the Catholic church. Allen explores this central idea that "one can find God through the practice of law, engineering or medicine, by picking up the garbage or by delivering the mail, if one brings to that work the proper Christian spirit." For Escrivá sanctification flowed in equal measure both in and outside the walls of the church. Much of Allen's own work getting to know Opus Dei is done with numerous, wide-ranging personal interviews, from the halls of the Vatican, to Africa, to U.S. suburbs. Allen is als