When the Chola king Sundara Chola faces a rebellion from the Pandyas and a secret pact by the Rashtrakutas, Veera’s father is assassinated. Young Veera, just 17, must protect his people, uncover the traitor within his own court, and prevent the royal insignia – a golden Vengai pendant – from falling into enemy hands.

It seems you're asking for a related to a book titled "Vengaiyin Maindhan" (வேங்கையின் மைந்தன்), possibly in PDF form.

The story follows his journey from a vengeful boy to a wise leader, with battles in the Kaveri delta, a forbidden love with a Pandya princess, and a final confrontation in the forests of Vengai. The novel ends with him refusing the Chola throne to establish a just rule in his own land, earning the title "Vengaiyin Maindhan" – the Son of the Vengai. As of now, no legally available PDF of a book by this exact title exists on public platforms like Internet Archive, Project Madurai, or Tamil Digital Library. Be cautious of unofficial sites claiming to offer a PDF – they may contain malware or pirated content.