Thomas Cahill's How the Irish Saved Civilization is one of those really frustrating books whose overall value fluctuates depending on what chapter you're currently in. It's rather like that old Longfellow rhyme:
There was a little girl,
Who had a little curl,
Right in the middle of her forehead.
When she was good,
She was very good indeed.
But when she was bad she was horrid.
Who had a little curl,
Right in the middle of her forehead.
When she was good,
She was very good indeed.
But when she was bad she was horrid.