has he written a book?
No, but he helped his sister in writing a book
John Barrowman
 His sister, English professor and journalist Carole Barrowman, helped write the book using her brother's dictations.
who does jack end up with in secret life UNANSWERABLE who is jack harkness? He is a fictional character  in "Doctor Who" and its spin-off series, "Torchwood". what is this character's nature and personality? lethally charming good looking and utterly captivating", as well as "flirtatious, cunning, clever and a bit of an action man". Jack's personality is relatively light-hearted what is doctor who? It s a British science fiction television programme what is this programme all about? The programme depicts the adventures of a Time Lord called "the Doctor", an extraterrestrial being, to all appearances human. The Doctor explores the universe in a time-travelling space ship called the TARDIS. who is the creator of this show? Sydney Newman which actor plays the role of that mentioned character? John Barrowman what are the other films/tv shows this actor can be seen in? "De-Lovely" ,  "The Producers" ,  "Dancing on Ice" and others
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John Barrowman [SEP] Books
Barrowman's memoir and autobiography, "Anything Goes", was published in 2008 by Michael O'Mara Books. His sister, English professor and journalist Carole Barrowman, helped write the book using her brother's dictations. In 2009, Barrowman published "I Am What I Am", his second memoir detailing his recent television work and musings on fame. Barrowman's first published work of original fiction was a "Torchwood" comic strip, titled "Captain Jack and the Selkie", co-written with sister Carole. Commenting on the characterisation of Jack Harkness in the comic strip Barrowman states: "We'd already agreed to tell a story that showed a side of Jack and a part of his history that hadn't been explored too much in other media.