Adrian Tan Gim Hai (born 1966) is a Singaporean lawyer and author. Known for writing the Teenage Texbook series of books in the 1980s, he is the current president of the Law Society of Singapore and a partner at TSMP Law Corporation. Early life and education Tan was born in Singapore to a Hainanese family. His parents were both teachers, and he grew up in a Housing Development Board (HDB) flat. As a child, Tan attended the Anglo-Chinese School and Hwa Chong Junior College. After his A-levels, he was offered a teaching scholarship to study English at the University of East Anglia. He turned down the scholarship to study law at the National University of Singapore (NUS). Tan served his national service as a member of Pioneer, the MINDEF magazine, after injuring himself during basic military training. While in university, Tan represented NUS as a debater in international competitions and televised debates in Singapore. He later completed a second, joint-honours degree in computer science and psychology from the Open University in 2004, while working as a lawyer. Career While an undergraduate law student at NUS, Tan wrote the novels The Teenage Textbook (1988) and The Teenage Workbook (1989), which became bestsellers that sold over 50,000 copies. The Teenage Textbook was also made into a stage play by The Necessary Stage in 1997; a film in 1998, which topped the box office in Singapore for four weeks; a 2017 musical titled The Teenage Textbook Musical; and a 2021 TV series on Channel 5. In 2015, The Teenage Textbook was listed by The Business Times as one of the top 10 English Singapore books from 1965–2015. Tan also was a consultant for the Channel 5 television legal drama, The Pupil. After graduating from NUS with a Bachelor of Laws degree, Tan began his legal career in 1991 at Drew and Napier, a large Singaporean firm. He initially practiced conveyancing law, but switched over to litigation thereafter, where he worked under Davinder Singh. In 1999, Tan left Drew for a two-year stint as general counsel of a technology firm, following which he returned to Drew. Eventually, after 22 years at Drew, Tan left to work for Stamford Law (now Morgan Lewis Stamford) in 2013. In 2018, Tan resigned from Stamford to work at TSMP Law. Tan practices litigation, and specialises in intellectual property, information technology, real estate, and shareholder oppression disputes. He is