Following a temporary suspension from Amazon's Kindle Library Lending Service, it appears that Penguin books are now migrating back to digital consumption. If you'll recall, earlier this week Penguin had to address some security issues (details are still in the dark, though) and consequently pulled its newer releases from OverDrive's catalog, as well as blocking Kindle devices from accessing the catalog's remaining Penguin titles. While Kindle access has since been restored, the newer titles "remain unavailable," though Penguin says it hopes to find a solution by the end of the year.