There are four novels, Thriller, Mystery, Romance and Science fiction - written by Akbar, Borg, Christ and David.
They are all published by Alpha, Beeta, Gama and Delta
not necessarily in the same order.
* The book by Akbar is published by Delta.
* The Thriller is published by Alpha.
* The Science fiction by Christ is not published by Gamma.
* The Romance novel is by David.
Who are the Authors and Publishers of each novel?