If any man will come after me,Matthew 16:24
let him deny himself.
Based on the verse above, this is one of the most profound books I have had the absolute pleasure of reading. It was penned by a Puritan called Thomas Manton in the 1600s! He extensively explored the subject of self-denial and produced this classic.
Thanks to an establishment called Chapel Library, you can download and read this book in PDF format for free, in revised English.