Two books from the Osprey Elite series, both with text by Nick Sekunda. Colour plates are by Angus McBride in the Greek volume and Simon Chew for the Persian one.

THE PERSIAN ARMY 560-330 BC - Osprey Elite 42
"Like other Osprey volumes, this one is especially useful for visualizing how various regiments dressed and were armed as well as giving a general overview of the Persian army during the Achaemenid period (560-330 BC) informed by recent scholarship and archaeology. It has excellent illustrations. I found it helpful for a novel I'm writing."

" As with the elite title on the Greeks by the same author, most of the book, save a brief introduction to the organization of the Achamenid Persian Army, is a highly detailed plate commentary. The plates are pretty good but are a little too similar. The text is a fine source on this subject, detailing a variety of troop types including several kinds of the Immortals bodyguard regiments."

THE ANCIENT GREEKS - Osprey Elite 7
" As always Osprey may a nice contribution to anyone intEresting in the Ancient Warfare of the Greeks, this books is not a deep look or study of the famous Hoplites or armies of ancient times but it could be use as a nice introduction to a really hard subject.
This was the first book I bought from Nick Sekunda and I was not disappointed, after reading this title I decide to buy other from the same author and follow the recommendations he made of other works that would really help you. The Author use the Plates of the one of the best historical illustrators Angus McBride to traces the development of Greek warfare throughout the classical period and offers a detailed account of Greek military dress during this famous period.
This book provides a unique and practical perspective on dificult theme in military history with wonderfully descriptive illustrations, to tell you the true I see this title as an invaluable resource for historians, if you are into Military History you should add this book to your shelves."

Amazon reviews

Both books are in good (Greeks) to very good (Persians) condition, The Persians book has light wear and the Greeks book has a faded spine and a previous owners details written inside the front cover