We have found out that the Penguin Group decided that they are no longer selling their new eBook titles through OverDrive. They have also decided not to make their eBooks available for download to a Kindle from OverDrive or the Kindle Owner’s Lending Library. This includes popular titles such as The Help, Miracle Cure and the Sookie Stackhouse series, to name a few.
UPDATE: Penguin has reinstated Kindle availability for Overdrive eBook titles.
New Penguin eBook releases are still not available. Penguin is now selling eBooks to libraries for 1 year leases.