Shadow of Night (All Souls Trilogy, #2)

by Deborah Harkness

‘Change is the only reliable thing in the world.’”

“Vampires reckon time differently than warmbloods do,” he said, still unwilling to release me. “How long is a vampire minute, then?” I asked, snuggling under his chin. “It’s hard to say,” Matthew murmured. “Some length of time between an ordinary minute and forever.”