Human Intelligence is soaring in Dr. Danny’s neurosurgical patients!A lavishly enriched blood supply piques Dr. Danny Tilson’s interest as he performs a routine surgery on Varg Dagmar’s brain. He soon discovers that it’s not just his patient’s cranial anatomy that’s remarkable, but his superlative mental capabilities as well.

What’s at the root of his patients’ mysterious soaring IQs?As more and more patients surface with similar mystifying profiles, Danny searches for answers. If he can figure out the cause of this surge in intelligent IQs, the ramifications to humankind could be staggering.

This is Book Three in the medical and personal adventures of Dr. Danny Tilson.Danny wonders, however. Is this mysterious brain power too good to be true?*****Collateral Circulation: a Medical Mystery is Book Three in The Doctor Danny Tilson Novels.Book One: Operation NeurosurgeonBook Two: Silent Fear: a Medical Mystery (also an audiobook)Book Four: Secondary ImpactAlthough the Doctor Danny Tilson Novels are a series, each book can stand-alone.