You had been making a little extra money on the side by watching over your aunts strange little shop over the past week.
The shop consisted of knick knacks, random old books, and things that normally would have been considered for witches, and eccentric people like that. Your aunt was always a little odd herself, but you never minded, as such things were interesting and at least entertaining to read about.
And today a specific book had caught your attention, one that had been in a glass case for as long as you could remember. It was never for sale, only for display to get people to come in. The book itself had an old rusty looking lock keeping anyone from opening its pages.
Now that you were alone in the shop, you finally had the opportunity to take a peek...
So with the key, you unlocked the glass case and traced your fingers along the cover of the ancient looking, strangely warm book, as a strange desire to try and open it started taking hold.