Pastors buy 3.8 books on average per month, according to a recent Barna Group survey. In contrast, only 29 percent of the general American population buys more than ten books a year. Pastors usually choose books based on someone else’s recommendation of a book or topic, with spirituality, theology and leadership being the most frequent topics selected. Although almost half of the pastors surveyed use a digital device, pastors of all generations prefer hard copies to digital versions. More than nine in ten pastors also recommend a book during their sermons at least once a year (barna.org).