According to Connelly, a number of changes were made "to the world of Harry Bosch ... in making the shift from page to screen". For example, in the television series, Bosch is born nearly 20 years later than in the novels, so that events can happen in the present day time, as they once did in the books. Also in the television series, Harry "is 47 years old and a veteran of the first Gulf War in 1991, where he was part of a Special Forces team that cleared tunnels. He has now been a police officer for twenty years with a one-year exception when he re-upped with the Army after &lt;a href="September%2011%20attacks"&gt;9/11&lt;/a&gt;, as many LAPD officers did. He came back to the force after serving in Afghanistan and again encountering tunnel warfare."