Plutarch's Lives has been called 'a bible for heroes.' It certainly is one of the most influential books of all history. In comparing all the children's versions, I selected the one I thought was the simplest and most descriptive as a gateway to becoming acquainted with these stories. You'll find other versions that are suitable for a variety of age spans in the online library. 
 
Paperback 5.5x8.5 378 pp.