Double, Double (Star Trek novel)

Plot

One android has survived the destruction of Roger Korby and his scientific facilities. The robot creates another Captain Kirk and fools the U.S.S. Hood with a distress signal. The Hood's command crew is soon overtaken by murderous androids and Kirk himself is framed for murder.

Kirk's android double takes over his command position on the Enterprise. The regular Kirk rallies the survivors of the Hood and his own crew into destroying the android's threat.