Complex sentence: The recipe book is never found, till Ivan finally moves out of the family home, as with "Rosebud" in "Citizen Kane," the cloth bound recipe book is disposed of as one more unrecognized piece of family memorabilia.
Split into simpler sentences: The recipe book is never found, till Ivan finally moves out of the family home. The cloth bound recipe book is disposed of as one more unrecognized piece of family memorabilia.