Edinburgh, Scotland has been the site of some mysterious goings-on over the past year. A series of intricate paper sculptures have surfaced at various art and culture establishments. Now. it would appear that Scotland's "Mystery Sculptor" has struck again. Last weekend, celebrated Scottish crime writer Ian Rankin received an anonymous birthday gift: a series of elaborate drawings referencing his popular Inspector Rebus novels. Today, Jian spoke to Ian Rankin about the unexplained sculptures and birthday presents.