Logos used to offer this resource:
A Treasury of Great Preaching : An Encyclopedia of Preaching
I could not however find it on the website.
I can't give you a definitive answer. I have the resource (actually a collection of books), but likewise can't find it on the website. The resource appears to be an older one. It is possible that the resource was originally created by a third party and now there are licensing agreements which need to be renewed before it can be sold again.
It was published by Word, which is now owned by Zondervan. Looks like it was published 1971 and renewed 1995.
