Alexander Carmichael's Carmina Gadelica
Prayers, blessings and invocations collected by the Scottish folklorist Alexander Carmichael in the Western Isles in the 19th century.
Celtic Monasticism: History and Spirituality
Survey, with pictures, explanations, virtual tours, and links.
How the Irish Were Saved
Issue of Christian History focuses on the conversion of Ireland, and Celtic Christianity from the fifth to the eighth century. Short popularizing articles.