The first of the two volumes — Circum-Baltic Languages: Volume 1 — Past and Present—surveys important sub-groups in the present-day Circum-Baltic languages,
placing them in their geographical, historical and societal setting and discussing specific contact situations.

The second volume — Circum-Baltic Languages: Volume 2—Grammar and typology—focuses on grammatical phenomena in the Circum-Baltic languages, relating them to the larger typological perspective. Each of the volumes contains three sections.