The most interesting dedication I’ve seen is in a first edition of The Rise and Fall of the Third Reich:
“Presented to the America Library in Pusan, Korea, by the parents of Dr. and Mrs. xxxxx and xxxxx 10/30/69”
I’ve removed the names. The doctor and wife (friends of our family) resided in South Korea for a few years, and the book – having resided unread on a shelf in the aforementioned library – was brought back and eventually gifted to me while I was in parochial school. I still have it.
The only other book I have that contains a dedication is Favorite Poems of Emily Dickenson:
“I think you will enjoy this book since you are a poet too. Love, Your Mother”
Mothers. I later explained to her the difference between POETRY and writing stuff that rhymes.