இருட்டில் வைத்த குறி (இரண்டு நாவல்களைக் கொண்ட நூல்)

Rajesh
Kumar is an extremely prolific Tamil novel writer, most famous for his
crime, detective, and science fiction stories. Since publishing his
first short story "Seventh Test Tube" in Kalkandu magazine in 1968, he
has written over 1,500 short novels and over 2,000 short stories.

Many
of his detective novels feature the recurring characters Vivek and
Rubella. He continues to publish at least five novels every month, in
the pocket magazines Best Novel, Everest Novel, Great Novel, Crime
Novel, and Dhigil Novel, besides short stories published in weekly
magazines like Kumudam and Ananda Vikatan. His writing is widely popular
in the Indian state of Tamil Nadu and in Sri Lanka.