All of the Oxford Handbooks are presently Readers Editions. These are quality references rich in diversity and content and relatively costly. There are presently no plans to develop these resources as Reference Editions. The only avenue available to us is to let FL know that we as customers value this particular series and are interested in seeing them made into Research Editions.
I was told that the channel that would allow us to bring our interests to FL's attention is through the feedback site. I was given instructions to use this link https://feedback.faithlife.com/boards/logos-resource-updates
Edit:Please vote for The Oxford Handbook of Early Christian Archaeology https://feedback.faithlife.com/boards/logos-resource-updates/posts/the-oxford-handbook-of-early-christian-archaeology