El mundo de Custodio. Libro I, El papel higiénico y otros asuntos de suma importancia - Martín de León, Carmen; Sánchez Elsner, Tilman (Madrid : Editorial Verbum, 2015)
Novel.
Online resource; title from PDF title page (Digitalia, viewed October 5, 2016)
Keywords: Custodio -- (Fictitious character) -- Fiction; Toilet paper -- Fiction; Humorous fiction; Fiction; Electronic books