[Woodcarver] How do you weight bookends?

[denny at cedarstump.us]

I have carved several busts of different ducks, male/female sets, to be used as bookends.  Although the base is usually rather large, the darn things sliiiiiiiiiide across the shelf when the books are but between them.  I have tried weighing them down with lumps of lead, but that didn't work.  I have tried putting "non-skid" rubber under them, but that didn't work.

I have looked at the ones in bookstores and cannot see what magic they use to make them work, but nothing made the light go on in my head.  ANY SUGGESTIONS?

Denny