Kong & Park specializes in Korean language learning books, favoring a systematic, textbook driven approach over immersion style learning. The New King Sejong Korean (KSJF) series builds vocabulary and grammar in careful sequence across multiple levels, pairing each student book with a matching workbook, and suits Korean language academies and self directed learners who prefer structured progression. Piefke Trading is an authorized distributor for ASEAN (Malaysia, Singapore, Indonesia, the Philippines, Myanmar, Vietnam, Cambodia, and Thailand), the GCC (Dubai, United Arab Emirates), Kazakhstan, Hong Kong, Taiwan, South Korea, India, Pakistan, the EU, the UK, the US, the EAC (Kenya), Namibia, Australia, New Zealand, and Israel.