Symbol Sourcebook: An Authoritative Guide to International Graphic Symbols

Invaluable tool for anyone working in design (graphic, industrial, etc.), UI/UX, architecture or even fine art (Basquiat was apparently a big fan of it).

Husband loved it

A good starting point for every UX/UI designer. But if you want to be up-to-date you'd rather have a look at Apple products, they have excellent symbols. Maybe it's Apple's turn to publish such a book?Also, there are (too) many automotive-related symbols nowadays, which did not exist at the time.To summarise, it's a good starting point, but make sure you update your knowledge elsewhere.