This is a Catechism and Confession of faith in 18 chapters. The format is question and answers. Robert Barclay was a Quaker
Definitions of Doctrine is a basic doctrines book in three volumes. Vol 1 has 26 chapters dealing with the doctrine of God. Vol. 2 has 27 chapters on Sin, Salvation, and Service. Volume three has 27 chapters on the Church.
Abstract of Systematic Theology is a 21 chapter work (short chapters) by Boyce (Baptist) that has a few half dozen questions in each section
Mark Cambron’s Bible Doctrines work is an extensive doctrines book used by Florida Bible College. Cambron’s work covers Angels, Man, Holy Spirit, Christ, Salvation, Sin, Prayer, and the Doctrine of God.
Thomas Watson Body of Practical Divinity is a set of sermons on different doctrinal topics of the Westminster Catechism.
Confidence in God in Times of Danger A Study of God’s Providence in the Book of Esther by Alexander Carson