Human slaves are valued for their administrative and military skills
In some places this volume is described as Janissaries combo volumes book 1. However it is not book 1 in the Janissaries series. That honor belongs to JANISSARIES. TRAN contains books 2 and 3 - CLAN AND CROWN and STORMS OF VICTORY. Which, if you are trying to read the series in order on Kindle, makes it the second book you should read. Unless of course you prefer to buy just one volume in which case LORD OF JANISSARIES, available on Kindle, combines the first 3 volumes of the series. The final volume, book 4, appears to be MAMELUKES, Janissaries book 4. If, after reading it, I discover otherwise, I will edit this review.
I did not enjoy the two books in TRAN as much as I did the first book. I particularly did not care for the devolving relationship between Lord Rick and Tylara, a tough lady I much admire. The ending of this volume does seem to offer hope for that relationship.
This volume reveals the information that more than one group of aliens is interested in the affairs of both Tran and Earth. Some of them believe that humans are becoming too dangerous but because of their value as janissary-like slaves, a proposal has been made to destroy just Earth rather than all of them. Lord Rick, Tylara and others struggle to save Tran from the alien Shalnuksis while human slaves of the Galactic Confederation work to save Earth and maybe Tran as well. Now things grow complicated.