In an Afterword the co-authors [of The God Beneath the Sea] explain that their aim in re-telling the Greek myths to the young is to avoid 'A haphazard sequence of tall tales' often related in a manner arising from certain conventions of translation from Greek poetry, but rather, to relate, 'as a continuous narrative' using a 'literary voice of our own time'. The manner in which many of the better known myths are put within a dramatic framework and given a coherence, both chronological and psychological, is indeed probably the greatest achievement of the book.

The narrative is strung between the two falls of the god, Hephaestus, hurled from Olympus first by Hera, his mother, and later by Zeus. After his first fall, 'the god beneath the sea' is told by his guardians, Thetis and Eurynome, of the great Creation myth…. Hephaestus' birth and fall is also recounted...