Another important aspect of the museum is its library. This library contains 1,587 volumes about 43 subjects including theology, philosophy, law, history and others. The oldest book here is a copy of the Suma Teologia by Thomas of Aquinas. The books had been in the care of the Museum of Bellas Artes in Mexico City than the Municipal Library of Toluca before coming to Zinacantepec, The books have been available to academics since 2005. The bookshelves and some other furniture are original to the monastery.