Spenser WarrenSpenser Warren is the author of One Last Kill, the first novel in the Callahan Boyle series. When he isn't busy at work on his next novel, Spenser is often reading, catching a comedy or improv show, and desperately rooting for a doomed Chicago White ox rebuild. You can get in touch with Spenser at his website, spenserwarren.com, or by connecting with him on social media. Spenser lives in Chicago. Read More Read Less