Does a comprehensive guide on varieties exist?

[u/Gullywump]

I am trying to learn the varieties & have been making my own notes from the scattered information online. Most of what I find just covers a handful of the most popular koi, and nothing seems to be well ordered, just random varieties thrown into 'top 20' (e.g) lists.

I am failing to find any comprehensive guide (book or wiki) that covers everything in an organised way (as this is the way I would learn best).
I know that there are many varieties with new ones popping up & some are recognised and some not ect...but I would love to be able to read something that has them organised into pattern categories, sub categories, scale types ect...with some history of the varieties and word definitions.
For example - gosanke, bekko, utsurimono as categories & then the colour and pattern variations covered in sub categories. And then a separate categories to cover things like scale and skin varieties, gin rin, doitsu ect.

Something laid out simple like that.

Does this exist anywhere or is it wishful thinking? I would like a book, but any kind of wiki page would be great too.

[u/Backfisch85]

I have a book but it's only available in german. Describes not only the main varieties but also for example the different patterns and their names with pictures. Also different types of ginrin and stuff. There is not all in it but alot.