The books below are older works, updated to more modern English with shorter sentences and paragraphs.
The Gospel Blessedness of the New Covenant, by Thomas Collier (1659)
The First London Baptist Confession, by William Kiffin (1644)
History of the Ancient Christians, by Jean Paul Perrin, (1618)
Plain Teaching on the True Gospel, by Menno Simon (1520)
Baptism and Babylon, by Andrew Ritor, John Tombs, and Hanserd Knollys (1642)
The 1833 Particular Baptist Confession, by John Brown (1833)
For the Saints! and the Aints, by William Mason (1773) and John Bunyan (1675)