There were only a handful of memory-books with parts missing left. But they were ones with rather large parts that had been ripped out of them. Eiro was positive that they were memories that were deeply connected to 'Emotions', something that was often rather hard to explain in words. So, it made sense if Eiro wasn't able to complete them just through logic by writing things down into the new books he was transcribing.
Eiro read through the books multiple times, trying to figure out how he should be able to recover the emotions from that time, but no matter what he tried, he was unable to feel anything. He felt weirdly disconnected from these memories, even when he made his ability focus only on that specific memory.
It was... like Eiro would never be able to feel that which he felt there at the time.
But then, Eiro slowly got an idea. Instead of focusing on a specific memory, maybe Eiro could change the library to only include books of a certain topic.
