Did Artemis get the gold at the end of the first book? What happened to Artemis's father and where did he go? Who's Juliet?

Juliet is Butler's sister.  She is sixteen and she is
training to be a bodyguard just like Butler.

Artemis does
get the gold at the end of the first book.  We can know this for sure because of what is
said at the beginning of the second book.  There, a reference is made to the ransom gold
that Artemis stole from the fairies.

We also know that
Artemis got away with the gold because Holly comes back out of the house and says that
she has only gotten half of the gold back.

His dad (we
later find out) has gone to Russia to try to deal with the Mafia up there so he can get
enough money to, hopefully, cure his wife.