On a recent trip I tried to use my iPhone as a reader in Airplane mode. However, even though I downloaded my complete library, only the books (in two panes) that I had open were able to be read--I couldn't open any other books. Also, those books let me read the rest of the current chapter or so, but then stopped loaded when in Airplane mode.
Is this a known bug, or did I run into something new? Or is it a known limitation? It doesn't make sense to me that a downloaded book couldn't be read in toto when in Airplane mode.