A physician, speaker, and former chemist, Barbara Ebel's new book, third about fictional Tennessee neurosurgeon Dr. Danny Tilson novel – Collateral Circulation: a Medical Mystery is one of the top-selling books on Amazon.com. Ebel’s writing draws heavily from her experience as an anesthesiologist, her dealings with family court, and her interactions with people and places from around the world. Ebel writes credible medicine into the background of her novels, and her O.R. scenes shine, so it's no wonder the first in her Dr. Danny Tilson Novels, Operation Neurosurgeon, was the top finalist for best-selling medical mystery books in 2012.