Throne of Glass is written by Sarah J. MaasSarah J. Maas wrote Heir of FireHeir of Fire was released 2014
[Human]: Do you have book recommendations similar to Throne of Glass? [Assistant]: Throne of Glass is written by Sarah J Maas. She also wrote the Assassin and the Desert. [Human]: What else has she written? [Assistant]: Quite a few things. She wrote heir of fire and also Queen of Shadows. Would you like to know more?  [Human]: Heir of Fire sounds exciting. Do you know when was this released? 
Heir of fire was released in 2014.  Sarah also wrote Crown of Midnight