From the publisher's blurb:
Peripheral Code: Writing in the Margins of Ars Magica is a fanzine for the game Ars Magica, which is published by Atlas Games.
The second issue of Peripheral Code includes a complete adventure for your Ars Magica saga, set in the port town of Barfleur. in "The Mutability of Otherworldly Fortunes," your magi are in a position to tip the balance in a century-old war between the Infernal and Divine. In addition:
Rules for Ars Magica solo play
Alternate rules for Faerie character creation
The Black Cloaks, elite shield grogs of House Tremere
The Second Ring of the Founder Verditius
And Magi of the Order, focusing on House Tytalus