I just finished reading the e-book "Collier's Guide to Night Photography in the Great Outdoors". Here is my review. I have read a good number of books on photography of the night sky and enjoy photographing the nights sky. Grand Collier's book is extremely comprehensive going from reviewing equipment and supplies, discussing software programs, websites and mobile apps to help you in your pursuit of an excellent night sky image. He gives great tips and instruction on how to blend multiple exposures create huge stitched images and how to process your images to make him the best that they could be. I already have learned new ways of post processing that I am going to try out.

Here are some of the topics that are covered in the book:
- How to photograph the Milky Way, northern lights, eclipses, meteors, lightning, air glow, lava, and more!

- What moon phases to shoot under.

- Light painting the foreground and recommended flashlights.

- Capturing star trails with both film and digital cameras.

- Creating comet-like star trails.

- Stitching huge images that can be printed very large.

- Stacking images and blending multiple exposures to increase detail.

- Focus stacking to increase depth of field.

- Using an equatorial mount (or star tracker).

- Enlarging star size to bring out constellations.

- Minimizing noise, light pollution, and elongated stars in post-processing.
Here are a couple of sample pages.