Their newest book, appropriately titled Marks, is out in the UK, and available for preorder here in the US. From Pentagram:
Marks, Pentagram’s latest book, collects 400 symbols designed by our partners between 1962 and the present day. The limited edition of 1000 copies has been published by Laurence King Publishing and is identical to the book produced by Pentagram for its friends and clients, sans tote bag but with the addition of a fetching white belly band. The book is printed on French-folded bible paper, bound in a red, cloth-covered softback cover and includes five ribbons for bookmarking.
I've already gone and placed my order, and will be anxiously awaiting it's arrival. A book of 400 symbols and logos? Designed by Pentagram? Ummmm... yes, please.
(Thanks David Airey, via Twitter)