What is the correct punctuation for: The book had some nice features, such as: a hard-bound cover, a ribbon for a bookmark, and the author's signatures.
How about "Among the nice book's features were a hard-bound cover, a ribbon bookmark, and the author's signature."
OR... reverse it... A hard-bound cover, a ribbon bookmark, and the author's signature were among the nice book's features.
Now.... if you have further problems with sentences of this sort... see if you can do it and post it. Then we will make any corrections or suggestions. Hope this helps.