"Until recently, these documents could be read in Adobe Reader 6
or 7. No longer. Adobe is withdrawing support from these, and so
the BL is insisting that its customers move to Adobe Digital
Editions. My researcher received a worrying email promising
"Enhancements to our Encryption Software". You'll note how the BL
see the delivery mechanism - it's an encryption channel first, an
actual service to the user... well, let's see."