A Whirlwind of Passed Lifetimes — Kimberly Vogel

Time passes by too quickly for Rune's tastes. Her time might be frozen, but her mortal friends continue to age. The spirits she works with don't have the same sense of time. Her timeline becomes theirs, but the extra time doesn't bring her any closer to stopping her brother. With him protected by his master, how many lives will it take before Rune can stop him? (The third book in Rune's story)