At first the detailed descriptions threw Castiel off, though it didn't take long for him to realize what Skulduggery was describing. So he had also run into that ghost. It seemed like the number of people who had been haunted was rather large, though Skulduggery had encountered her in the Sun Room, not the hallway outside it. But it still seemed clear that her haunting grounds were on the first level...

He hadn't heard of any red, one-eyed snakes, but he kept the warning in mind, nodding along as Skulduggery finally got to the point. The Oxford Book of English Verse. He would remember that, of course. "Which aisle is it on?" he asked. That was still the most important fact that he needed, all dangers aside.

Castiel felt strong enough at this point that he was relatively certain he could handle himself in a fight. If he could only find a seasoned fighter to go with him, there would be no reason to pass up this chance. Perhaps he could track down Kratos and ask him...

"I'll share whatever information I find with you," he agreed. "Thank you for doing the same." Castiel had become almost practiced at coordinating and allying with people here. It was strange, considering that there had been a time when his human interaction had mainly been limited to Dean and Sam.