Canon within a canon

Scripture is referred to as a "canon"--a compiled collection of books, letters, and poetry. The phrase "canon within a canon" basically means this--throughout time individuals and churches have latched on to certain books. For instance--Luther lived in Romans. The Churches of Christ have enjoyed a close knit relationship with Acts. And so on...

Here's the question--what has been your "canon within a canon?" This doesn't mean that you have chosen to neglect dozens of other books. But, what are the books that have formed you in your faith the most? When you experience seasons in the desert, what parts of Scripture revive your soul?