Everyone, no matter what his or her age, should read this indispensable retelling of the Greek Myths, a foundation stone of the Western tradition.
I feel immensely fortunate that I was exposed to this title by my parents at a very young age.
It does, however, have two drawbacks, one I can forgive and one I almost cannot. First, the myths are a little bit bowdlerized. But since this is a book for children (albeit one which doesn't hesitate to stretch the vocabularies of younger ones), I can excuse that.
The bigger problem is that there is no pronunciation guide. Pronunciation of Greek names, since they in some cases came into English through the digestive tracts of Latin and Old French before landing in England in 1066, and in some cases are more modern borrowings, is wholly unpredictable by, well, any English speaker, let alone children. It is perhaps a shame that the popular culture doesn't make allusions to Hephaestus, Mnemosyne, Terpsichore, Dionysus, and Aeneas as an everyday matter, but the fact is it doesn't, and it's a shame to leave little kids at sea (like Perseus?).
Before I gift this to some young relatives of mine, I intend to prepare a pronunciation guide in LaTeX (or LyX) and tape it into the endpapers.