Patrice Martinez 
Eryx and the garden of the Hesperides [EPUB ebook] 

When Eryx and his companion Boentos arrived at Massalia, the two thieves decided to despoil the Artemis sanctuary. To their dismay, that did not work: surprised by guards of the Phocaean city, they had to hurriedly leave Lacydon, the Massalia port, aboard a frail vessel. But what the two thieves did not know was that their adventures carried them beyond the columns of Herakles to Erytheia Island. The most beautiful of orchards spans this wild area: the garden of the Hesperides!