You won’t find much in PDF form unless you find it with bittorent or something. The Shake 4 quick reference guide is handy. It’s $20 and it can be bought from Peachpit Press. http://www.peachpit.com
Suggestions: Use Adaptive mode (optical flow). Use spline curves when you want a smoother ramp from one key frame to another. Use Hermite when you want the ramp to fire closer to the key frame. Use fast for the de-interlace mode if using SD footage. If working in higher res or if there is a lot of movement set the de-interlace to good. Always interpolate your ramped footage. This will create new frames and will not use frames from the original sequence. It also helps smooth the ramps and limits strobing.
Use blend (mixed frames/fields) only as a proxy, keep the frame weight at 0.
—