Hawoo Publishing specializes in Korean language learning books, developed in connection with Sogang University's Korean Language Education Center and geared toward classroom tested instruction rather than casual conversational content. The Sogang Korean series pairs student books with dedicated writing books across sequential proficiency levels, making it a natural fit for university Korean programs and intensive language institutes. 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.