The chain has an "S" hook at each end so can easily be removed and used on some other pendant that you own.
It has been bumped up a little and has some damage on the hanging loops at the bottom with some missing pieces as well. Their colours are great but they are vintage plastic and could easily be replaced by the new owner.
Two other books of value are: Beads of Borneo by Heidi Munan, and Oman Adorned by Miranda Morris. Here is a great, light-weight antique silver necklace from Iran, constructed with pieces of stamped silver connected like pendants, with jump rings and chain.
Stretched out, the piece is 19 1/2 inches from end to end.
Here are more beads from Afghanistan - Bead #1 - 1 1/2 inches long - $12.