There are many Reformed Baptist titles along with Puritan writings on www.solid-ground-books.com that would be GREAT in Logos.
-Covenant Theology: From Adam to Christ, by Nehemiah Coxe and John Owen
-The Fatal Flaw of the Theology Behind Infant Baptism, by Jeff Johnson
-Covenant Theology: A Reformed and Baptistic Perspective on God's Covenants, by Greg Nichols
-The Distinctiveness of Baptist Covenant Theology: A Comparison Between Seventeenth-Century Particular Baptists and Paedobaptist Federalism, by Pascal Denault
-Covenant Theology: A Baptist Distinctive, by Earl Blackburn
-The Kingdom of God: A Baptist Expression of Covenant & Biblical Theology, by Jeff Johnson
-Recovering a Covenantal Heritage: Essays in Baptist Covenant Theology, by Richard Barcellos
-Getting the Garden Right: Adam's Work and God's Rest in the Light of Christ, by Richard Barcellos.
-Covenant Children Today: Physical or Spiritual?, by Alan Conner