Shadows of the apt

1. 

   Book 1

   Empire in black and gold

   Adrian Tchaikovsky

2. 

   Book 2

   Dragonfly falling

   Adrian Tchaikovsky

3. 

   Book 3

   Blood of the mantis

   Adrian Tchaikovsky

4. 

   Book 4

   Salute the dark

   Adrian Tchaikovsky

5. 

   Book 5

   The scarab path

   Adrian Tchaikovsky

6. 

   Book 9

   War Masters Gate

   Adrian Tchaikovsky

Book data and covers from Open Library (openlibrary.org).