In the 80s, 90s, and 00s, he was mostly known for his work on shyness and anxiety. https://www.goodreads.com/book/show/672266.Shyness https://www.goodreads.com/

In the 80s, 90s, and 00s, he was mostly known for his work on shyness and anxiety. https://www.goodreads.com/book/show/672266.Shyness https://www.goodreads.com/book/show/672266.Shyness