What came to mind was the first book of the Harry Potter series.
Here is the excerpt:
Extract from Harry Potter and the Philosopher’s Stone
by J.K. Rowling
‘Nicolas Flamel,’ she whispered dramatically, ‘is the only known maker of the Philosopher’s Stone!’
This didn’t have quite the effect she’d expected.
‘The what?’ said Harry and Ron.
‘Oh, honestly, don’t you two read? Look – read that, there.’
She pushed the book towards them, and Harry and Ron read:
The ancient study of alchemy is concerned with making the Philosopher’s Stone, a legendary substance with astonishing powers. The Stone will transform any metal into pure gold. It also produces the Elixir of Life, which will make the drinker immortal.
There have been many reports of the Philosopher’s Stone over the centuries, but the only Stone currently in existence belongs to Mr Nicolas Flamel, the noted alchemist and opera-lover. Mr Flamel, who celebrated his six hundred and sixty-fifth birthday last year, enjoys a quiet life in Devon with his wife, Perenelle (six hundred and fifty-eight).
‘See?’ said Hermione, when Harry and Ron had finished. ‘The dog must be guarding Flamel’s Philosopher’s Stone! I bet he asked Dumbledore to keep it safe for him, because they’re friends and he knew someone was after it. That’s why he wanted the Stone moved out of Gringotts!’
‘A stone that makes gold and stops you ever dying!’ said Harry. ‘No wonder Snape’s after it! Anyone would want it.’