I'm very sorry to see your TB is missing again 😟
I tried to contact the newbie cachers who logged the cache it was in as found back in December, but they have not replied.
I emailed them again today but doubt they will reply.
I may be wrong but as they have not logged any TBs before it is possible they took your book and didn't know what it was.
Of course it may not be them that took it at all, it is hard to know for certain.
The cacher who found the cache after them advised no TBs in the cache when they visited, so there are not many logged finds before it was missing.
I do hope your book turns up again soon.