Unfortunately, many Testudo species books are written in German, Italian, or French and have not been translated into English. These English language books listed below are not specific to Greek tortoises (Testudo graeca), but care for most Testudo species is very similar. Much of the care info for Hermann's and Russians also applies to Greeks.
Books here are not shown in any particular order and listing a book on this page does not necessary mean I am endorsing it. Click on the book titles for full info.
Naturalistic Keeping and Breeding of Hermann´s Tortoises
* by Wolfgang Wegehaupt / Wegehaupt, Apr 2009
/ beautiful photos, 352 p. / one my favorite Testudo books / ISBN-10: 3980977447, ISBN-13: 978-3980977449
Mediterranean Tortoises, Gentle Creatures in Hard Shells
* by Thorsten Geier / Kleintierverlag.de, Sep 2022
/ includes the Greek tortoise / many photos, 178 p. / ISBN-10: 3944484339, ISBN-13: 978-3944484334
Russian Tortoises in Captivity
* by Jerry Fife / ECO Publishing, 2012 / 109 p. / ISBN-10: 1938850033, ISBN-13: 978-1938850035 (online), ISBN-13: 978-0978897987 (in book)
The Tortoise Trust Guide to Tortoises & Turtles
* by Andy Highfield / Carapace Press, Dec 2013 / updated 4th edition / some Greek specific info
* by Lance Jepson / Kingdom Books, Havant, 2006 / limited availability / ISBN-10: 1852792299, ISBN-13: 978-1852792299
* by E.J. Pirog / TFH, 2012 / includes the Greek tortoise / ISBN-10: 0793828635, ISBN-13: 978-0793828630
* by E. J. Pirog / TFH Publications, 2006 / includes the Greek tortoise / ISBN-10: 0793828821, ISBN-13: 978-0793828821
* by Phillippe De Vosjoli / Advanced Vivarium Systems, 2003 / includes the Greek Tortoise / ISBN-10: 1882770668, ISBN-13: 978-1882770663
* by Brian Pursall / TFH, 1994 / limited availability / ISBN-10: 0793802849, ISBN-13: 978-0793802845
* by Lance Jepson / Pet Expert, 2011 / covers Greeks, Hermanns & Russians / ISBN-10: 1907337148, ISBN-13: 978-1907337147
Two additional books from one of my favorite Mediterranean tortoise authors, Wolfgang Wegehaupt. I am glad that more of his German language books have now been translated into English. He has also published a book about raising baby Testudos, but as of this writing I haven't seen an English version of that book yet. His books are informative and full of beautiful photographs.