I found this tiny book. It is really tiny ... 1 inch by 15/16 inch! That qualifies as a "micro-book" in my mind! It is titled: Guest Book - Craig Carter Miniatures. It notes: This volume from March, 1960.
The entries are dated from 1960 to 1975. Here is a gallery of the micro-book and some of its contents.
If anyone knows more information about this Craig Carter and his miniatures, please let me know.