Schott’s Significa - a miscellany of secret languages

This is a printed book, a clever, well researched compendium of many intrinsically interesting “secret languages” — words and phrases, even body language and flags that are unique to a wide ranging selection of disciplines, pursuits and sub cultures. Examples include espionage, fine art auctions, stunt performance, bespoke tailors, paparazzi, etc. An Army Surgeon friend enthusiastically verified both the medicine lingo and the army hand signals. Thumbs up to both. Great gift for the right person.