Andrew Naselli's book Let Go and Let God? A Survey and Analysis of Keswick Theology was released yesterday. If you grew up in the Keswick stream, consider purchasing as a way of understanding and reviewing your roots. I couldn't "put it down" (if you can say that of an electronic text.)
While Naselli's critique is from a Reformed perspective (not really how I would describe myself), I found it informative, quite even-handed, and pastorally very useful. It reads a bit like a thesis in spots, but is very accessible with a great deal of research under the surface. J I Packer seems like an important influence.
The only major limitation is that he dealt with Keswick views only up to 1920, due to diversification of views since then. It deals with influence of Keswick roots rather than current thinking.
I hope this post is received as promoting awareness of a new resource that Logos itself published. Phil Gons gets a special mention in Acknowledgments (page 31.)