Grace Publications Trust produced the "Great Christian Classics" a number of years ago. These were excellent abridgements of the great classics of reformed theology. Christian Focus have recently started republishing this collection under "Grace Essentials". This would be a great resource to have on Logos.
Here is a link to the abridgement of John Flavel's "God Willing"...
https://www.amazon.co.uk/God-Willing-Conduct-Providence-Essentials-ebook/dp/B07P7XDMH4/ref=sr_1_1?keywords=Grace+Essentials&qid=1559344184&s=digital-text&sr=1-1