Puritan Paperbacks in the public domain already available on Monergism in eBook formats. 

Two Paperbacks are original works, and not in the public domain, those are "A Puritan Golden Treasury," and "All things made New" by John Flavel. Those cannot be made into eBooks. 

by Robert Norman

by John Colquhoun

by Thomas Brooks

by Brandon Solberg

Historically Reformed

– Affirm the great “sola’s” (Latin for “only”) of the Reformation.

Sola Gratia…Grace Alone
Sola Fide…Faith Alone
Solus Christus…Christ Alone
Sola Scriptura…Scripture Alone
Soli Deo Gloria…To the Glory of God Alone

To summarize, salvation by Grace Alone, through Faith Alone, in Christ Alone, according to the Scriptures Alone, to the Glory of God Alone.

by Thomas Manton

by Stephen Charnock

For Christ our passover is sacrificed for us,-- 1 Cor. V. 7.

What are the top Puritan works that every Christian should read? Iain Murray answers "Beginners should start with Brooks, Thomas Watson, or John Flavel. ...

1. Not rooted in the historic reformed tradition

2. Eschews scholasticism entirely.

3. Myopic focus on "five points of Calvinism" to the detriment of covenant theology which undergirds the entirety of the canons of dordt.

4. Autonomous churches with a tendency not toward congregationalism but de facto episcopalianism with none of the safeguards of either system.

5. Church growth prioritized over church health.

6. Lack of conversation with classical Christian theism in favor of individual ingenuity of particular theologians.