How long does it take to write a book? Great question. It takes as long as it takes. From first word in 1981 until the middle of February 2014 my first book was in the mill. With the crash of the western market it was rejected and otherwise abused 45 times, with over 75% of those being the old familiar, "Does not meet our needs at this time. Try us again." 20 of them said, "Liked it. No market, sorry." or something similar.
It is now in the proofing stage with createspace.com.
Never give up.