You can email supportdos@larian.com, with a description of the problem and the report.zip file generated by the
D:OS support tool (for the PC version). The report will contain system and game information, any crash dumps, and your saved games. To reduce file size, you could delete all saves except the latest one(s) where you have the will/book, the oldest where they are missing, and your most recent save. If you remember what you did between the two saves where the item(s) disappeared, that might help in reproducing the problem.