The Tax Assassin - Seth and Ava Mysteries, #1

"I don't care if you kill to get the money; you're going to pay your taxes on this land, " tax agent, Paul Bradley said in 1913, only moments before his death. A hundred years later, Seth O'Malley's old friend passes him a cold case - four unrelated murders one hot summer in Minneapolis. Twenty-four hours later, Seth is hosting a house full of detectives with similar stories - four unrelated murders happened each summer in some mid-sized city in the United States.
When murder-for-hire turns personal, Seth and Ava hope to find the tax assassin in Southeastern Colorado before he completes the contract to kill Ava and her entire family. Filled with memorable characters, romance, and intrigue readers have come to expect from Claudia Hall Christian, the Tax Assassin is the first in the Seth and Ava Mystery series.