Underware

"For more than ten years the pan-European design collective Underware has been creating versatile fonts, surfing the waves, conducting type workshops, running the radio station Typeradio, throwing cannon balls, experimenting with blood, practicing kamikaze chess; but mostly, they gave flowers for their mothers and turned them into a cover girl. Which resulted in an everlasting smile on their faces.
The company was founded in 1999 by Akiem Helmling, Bas Jacobs and Sami Kortemäki. We are based in Den Haag, Helsinki and Amsterdam."

I really like how on their website, not only do they sell their typefaces but they also show them in context.

They also sell their specimen books, but unfortunately I cannot buy any as they are either sold out or are in the wrong currency for me to purchase. 

"This book, designed by Faydherbe/DeVringer, is the first demonstration of the typeface Dolly. The book contains texts which are written by several people, i.a. Erik Spiekermann, Edwin Smet, Guy Tavares, Ewan Lentjes, Anne Knopf, Michael Rock, Eike Menijn, Markus Brilling & Somi Kim, Lennart Wienecke & Wilbert Leering. It also shows the font in different ways of course."

"This book is the first demonstration of Sauna. More than just a specimen, it is an intensive approach to the world of saunas. The typeface Sauna is presented in a rich content; giving pleasure not only to graphic-designers but also to everybody who's life is not connected to ligatures and smallcaps. The book was designed to withstand a sauna bath without any damage: it is restant to hot steam of 120 degrees Celsius. Even better, some parts of the book can only be read inside a sauna at 80 degrees Celsius or higher! So take this book, go to a sauna, and get the "live" experience while reading."