I found a fantastic book in a charity shop. It is "Posters" by Bevis Hillier.
It tells the history of posters and is full of wonderful examples from the earliest days up to the psychedelic 60s. It is a very interesting and informative book.
My personal favourites are the late 19th century French posters and those from WWI,
There are lots of colour plates and many in black and white.
The book is not in great condition, so I think I might frame some of my favourites.
Hope you have a great weekend.