Arnold Dallimore's two volume Banner of Truth biography on George Whitefield.
Whitefield painted a picture of how to live a godly life, how to preach Christ alone, how to suffer, how to love your enemies and how theology (good theology!) should dictate our actions.
[But Pilgrim's Progress, Foxe's Book of Martyr's, Scougal's Life of God in the Soul of Man, Matthew Henry's Pleasantness of a Religious Life and Rev. John Baird's Nearer Heaven all come in a close second!]

The Enemy Within by Kris Lundgaard. Yes, there are more thorough examinations of Owen out there, but this one seems to get to the heart (through the head) most efficiently.

Knowing God, by J.I. Packer

Paul,

Dallimore's book is two volumes! You can only take half the book...

Can we still go to the library?

You mean after all that typing and trying to slip in 17 books into one category you reduce me to half a work?
That's it.
I'm telling your father.

Morning and Evening by Spurgeon. I need a book that is going to lift up my soul while being honest about my sin, and Spurgeon does that brilliantly. Plus, 730 verses about various subjects along with Spurgeon's meditiation on those verses would be an amazing resource. Spurgeon's writings are very meditative in nature, and if I'm only going to have one book, I want a book that is going to help me meditate on the Bible.

Good thing you didn't ask for best 7 books - Paul would have had 49...I suppose if I were stuck on a desert island I might choose The Providence of God by Flavel. Hopefully, I would be encouraged that I wasn't there by accident.

Sin and Temptation by John Owen.

kanns

spurgeon. something by spurgeon.
morning and evening or beside still waters...

i wanna have the book entitled The Supernatural Ways of Royalty: Discovering Your Rights and Privileges of Being a Son or Daughter of God by bill johnson and kris valloton.