Biography.com: Erigena, John Scotus: Biographical paragraph.
Essays On Line: John Scotus Eriugena: Outline of this medieval scholar's life and philosophy, by Siegbert W. Becker. Available in PDF or RTF format.
Johannes Scotus Erigena: Biography of this medieval Neoplatonist, by Peter Morrell.
John Scotus Eriugena: Article from the Catholic Encyclopedia by William Turner. Recounts this scholar's life and influence, and evaluates his teachings and length.
Notes on John Scotus Eriugena: By Andrew Irvine, from his reading of this medieval thinker.
Stanford Encyclopedia of Philosophy: John Scottus Eriugena: Article exposing the thinker's biography, ideas and bibliography.
The Collected Works of Johannes Scottus Eriugena: Account of the preparation and publication of this scholar's writings as part of the Corpus Christianorum, with special emphasis on his Periphyseon.
The Mystery of God in John Scotus Eriugena: Outline of this thinker's system, in the context of early Irish spirituality.