OK, how about Glass and Steele as another suggestion for a fantasy enjoyer looking to add some mystery?
It’s a story of Wild West cowboys coming to Victorian England in search of a magician, while magic is functionally illegal because the respective guilds ban magicians from membership. I don’t want to spoil anything by going too far explaining the premise, but there’s a core investigation each book that expands their understanding of magic in the process.
The magic doesn’t have the depth of epic fantasy like Sanderson, but it is unique and fits well with the premise. This series (and some other CJ Archer stuff) is another of the ones I come back to every once in a while. It’s definitely on the lighter read side, but I enjoy the worlds she builds and her characters.
But mystery is my jam, so if you want about 100 long light mystery series, I’m your man lol.
https://en.wikipedia.org/wiki/Vickrey_auction
There are numerous formats of auction. I don’t think a Vickrey auction is what they did, but it is an example of a sealed auction format that is well supported as legitimately and efficiently maximizing value for the seller.