This is because the embedded styles are dependent on a spline which is not imported when using the library. You can get around this by editing the embedded styles so that they use the X Size
property instead of a spline to determine the array's length.
You'll need to do this for the stack of books and both leaning book embedded styles as well.
You'll find that the stack of books is no longer oriented correctly when using X Size instead of a vertical spline. So to fix this, open the master style and change the RC-Books segment's Transform > Rotation > X Value
Basically, nested railclone styles are possible in the library, so long as the embedded styles don't require splines. I hope that helps to clarify the issue, but please let me know if there's anything else.