Blood Hunt is a 1995 crime novel by Ian Rankin, under the pseudonym "Jack Harvey".

Gordon Reeve, a former SAS soldier, receives a phone call in his home in Scotland, informing him that his brother Jim has been found dead in a car in San Diego - the car being locked from the inside, and the gun still in Jim's hand.

While in the USA to identify the body, Gordon realises that his brother was murdered, and that the police are more than reluctant to follow any lead.

Gordon decides to return to the USA, where he infiltrates the investigation corporation, and learns more about the history of the case.

Then he travels to San Diego, to collect more evidence, and eventually returns to England, deliberately leaving a trail for Jay.