Books on fun and interesting math not normally learnt in the classroom, and also requiring a fair amount of mathematical maturity (advanced undergrad for example). So no pop-math books.
An example would be the topics explored in PBS' Infinite Series youtube channel
https://www.youtube.com/channel/UCs4aHmggTfFrpkPcWSaBN9g
I recently ordered Conway's Numbers and Games, and I believe that fits the bill.
An example would be the topics explored in PBS' Infinite Series youtube channel
https://www.youtube.com/channel/UCs4aHmggTfFrpkPcWSaBN9g
I recently ordered Conway's Numbers and Games, and I believe that fits the bill.