The problem is that when we (since i'm having this issue too) try to either drag a pdf/ebook from a folder into iTunes, or try to "Add File to Library"iTunes crashes and for me anyway, doesn't generally take the file.
Problem signature:
Problem Event Name: APPCRASH
Application Name: iTunes.exe
Application Version: 12.1.2.27
Application Timestamp: 55236b62
Fault Module Name: StackHash_e3f2
Fault Module Version: 6.1.7601.18798
Fault Module Timestamp: 5507b864
Exception Code: c0000374
Exception Offset: 00000000000bf922
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: e3f2
Additional Information 2: e3f280101afd7990b7667117b1bf6fa9
Additional Information 3: 072e
Additional Information 4: 072eee35f5f1e2df3ebedcb7f6b28e1d
I haven't been able to add new pdfs to read in iBooks since iTunes 10 or so.
Any useful suggestions welcome. 🙂 This is happening on a clean install of windows, too, for me. I just installed it all clean and want to read my pdfs, and update some.