At this time we don't have any information on additional volumes from this collection.

Volume 4 (Supplements), edited by Younger, was published by Brill in 2017. It would be nice to get in Logos format.

Seems like some books are a little slow to be updated. This comment asking for when the 4th volume will be available is still valid. Still expanding my own paper library as many books I am interested in are here, but not fully here in Logos. Please add vol 4.