Wikipedia
Praktikos
The Praktikos is a guide to ascetic life written by the early Christian monk Evagrius Ponticus. It was originally written in Greek, but also has Syriac and Armenian versions. This work is the best preserved of all the Evagrian writings due to the relatively large number of manuscripts and wide distribution (Bamberger 1972:lix-lx).
The Praktikos consists of 100 chapters. Of the 100 chapters of the Praktikos, demons are mentioned in 67 of them.