You can find Lukacita through various Indonesian literary platforms:

Both characters stand on the edge of giving up on the ambitions they have chased for years. Through their meeting and shared struggles, they undergo a journey of learning how to forgive their circumstances, accept their imperfections, and heal from the invisible wounds that come with high ambitions. 💡 Core Themes for a Solid Paper

I'm assuming you're referring to the book "Luka and the Firefly" doesn't seem to match, rather I was able to find information on "Luka and Duda" Valerie...Patkar?. No matching results on “Luka Cita Valerie Patkar Pdf”.