Just added to the hobby library today, and acquired for €5.39 from WOB (I wasn't aware that it existed until it was mentioned by Brian Carrick):
Published in 1991 by Argus books and running to 112 pages, the book is mainly a Listing of companies producing metal figures in the Toy Soldier style starting in the 1970s through to publication date. Lots of black and white pictures plus some lovely pages of colour photographs. I'm not intending to start collecting, but it's a really nice book just to look at!