With the death of Gildre, the shop door vanished, reverting back to an ordinary broken door of a residential house.
Although Chen Xuan could use his recall ability to teleport himself into the shop, he chose not to return immediately but instead glanced at the cliff beside him...
According to the marshal, when he was a child, he discovered the cave that housed this book on the coastal side of his family's estate. It was located west of the small chapel, less than five miles from the castle where he often stayed. And standing on this sea cliff, he could indeed see in the distant forest a grey castle, which means the cave should be right beneath this cliff.
Chen Xuan thought for a moment and decided to look below first.
