I received this book by Stephane Thion, on the various Egyptian Macedonian armies, in the post at the weekend. Stephane is a French author and gamer, with whom I've occasionally corresponded; he seems like a very nice chap. The book has 64 pages and is and packed with simple but beautiful colour reconstructions of Ptolemaic uniforms, from the founding of the kingdom to the arrival of Caesar. Many of these illustrations are taken from grave stelae (handily naming the deceased under each drawing), and others are hypothetical. I found the colours very useful, in particular there's one chart showing the colours from the grave stelae, all together.
Everything is there, from the agema, through the phalanx, to the exotic Galatians and Sudanese. There are even some cavalrymen with horses and riders fully covered in textile armour... which I recall described in an old Slingshot.
There is a good deal of text, in French. My reading French is poor and it will take me quite a while to work through this, but I'd recommend the book on the strength of the colour illustrations, alone. They are beautiful, and so very useful to a gamer/painter. I bought my copy on Amazon.