I love this little book - it's small enough to pop in your bag and contains some lovely simple designs.
Would make a lovely gift for the girl in your life who enjoys crochet but doesn't like making 'granny things'!
I agree that the crochet work isn't the most challenging you'll come across, but I think that's a good thing as you'll be working with new materials and until you're used to croceting with wire its probably best to begin with simple crochet.
More importantly, the jewellery designs are all very wearable. Some modern, some more classical, but on the whole they all resemble pieces that I would buy myself from shops likes Azendi etc.
One thing to note is that the book is American - so don't forget to swap your doubles for trebles and your singles for doubles!