Trent,
"Astronomical Spectroscopy for Amateurs"
https://www.amazon.com.au/Astronomic...+spectroscopes
Covers some history, spectroscope design, commercial spectrographs and software as well as construction details for a DIY instruments.
"Grating Spectroscopes - How to use"
https://www.amazon.com.au/Grating-Sp...+spectroscopes
Primarily for users of the Star Analyser/ Rainbow Optics gratings. How to set them up and process/ analyse the spectra.
"Imaging Sunlight - Using a digital spectroheliograph"
https://www.amazon.com.au/Imaging-Su...aging+sunlight
Background history and details of solar phenomena - photosphere and chromosphere. Solar filter design and commercial solar filters. Applying hi resolution spectroscopes to obtain AVI files of the solar spectrum, converting these to a very narrowband solar image. Examples of many SHG built around the world.
Hope this helps,
Ken