For Joshua Still, Skills were the lifeblood of his business. He wanted to understand them, collect many of them, and teach a few of them. Which was a problem because while his profession of a Skill Trainer was perfectly legal, it was frowned upon by most of the kingdom. After all, it wouldn't do for a non-tailor to teach Tailoring. Or, so says the Tailors Guild.
The same could be said by the Blacksmiths, the Bakers, the Butchers, the Candlestick Makers, the Mages, and every other Guild with enough money and clout to complain. But still, Skill Trainers provide a valuable service, and so he has managed to start his business and keep it under the table. To a degree. With many a bribe. But his quiet anonymous life of research, practice, and training was about to change. When the Baron demands you pay him a visit, you have little choice.
If I have a complaint, it would somewhat uneven pacing, particularly the not-exactly "and the all lived happily ever after" (but not-exactly) post-duel aspect. Months happened in paragraphs, and then decades were discussed in dialog, whereas earlier chapters seemed to need multiple to span an afternoon.
On the other hand, it was entertaining and fun, which is what I look for in my cotton-candy reading.
Good character development, pacing, and worldbuilding. The author clearly has an understanding of how human politics work, even in a fantasy world, but those politics don't turn this into a depressing read.
Really intriguing world and protagonist, quite a unique perspective from most litRPG, having teaching be the primary focus adds a unique flavour that helps differentiate this from most of the genre, in addition to the political maneuvering present throughout and analytical, paranoid protagonists view of the world
the ending felt slightly rushed and incomplete, I hope this isn't the last we see of this story! Plenty more to explore