I recommend anything by George F. Simmons, as well as anything by Russians. Seriously, if it's a Russian sounding author's name, then odds are good that it's we

I recommend anything by George F. Simmons, as well as anything by Russians. Seriously, if it's a Russian sounding author's name, then odds are good that it's well written. They had amazing pedagogy and the EMS series (a joint publication by Springer and the old Soviet publisher VINITI) is first rate. https://www.amazon.com/Encyclopaedia-of-Mathematical-Sciences/dp/B08BC5GZWZ https://www.amazon.com/Encyclopaedia-of-Mathematical-Science...