I started a job recently that relied on much more Django skills than I had. I'm a senior programmer, but my Django was dusty. Purchasing "Two Scoops of Django" was a fantastic investment. The material is moderately dense, giving "best practices" to a wide range of practical topics.

For me, a technical "here's what's really important" book is the most valuable. Django docs (and the Django Book) are great, and I'm thrilled to have them plus "Two Scoops" to use for my day job.