El hombre que sólo amaba los números

The book balances his groundbreaking work with his unique personality. I'm curious how the author decided what to include or omit about his personal life.

His passion for mathematics seemed almost obsessive at times. How did others perceive his dedication — inspiring or overwhelming?

Erdős's work is highly technical, but the book manages to make it accessible. I wonder what strategies or analogies they used to do that.