This is an English translation of the Sanskrit Dasakumaracharitam. For another version in English see Ryder's The Ten Princes.
The book is available at Project Gutenberg (I have not checked for other online sources). There's also a free audiobook at LibriVox!
Table of Contents
HINDOO TALES OR, THE ADVENTURES OF TEN PRINCES
ADVENTURES OF SOMADATTA.
ADVENTURES OF PUSHPODBHAVA.
MARRIAGE OF AVANTISUNDARI.
FURTHER ADVENTURES OF RÂJAVÂHANA.
ADVENTURES OF APAHÂRAVARMA.
ADVENTURES OF UPAHÂRAVARMA.
ADVENTURES OF ARTHAPÂLA.
ADVENTURES OF PRAMATI.
ADVENTURES OF MITRAGUPTA.
ADVENTURES OF MANTRAGUPTA.
ADVENTURES OF VISRUTA.
