He had various jobs, and spent two years as an American GI, before he began working as personal assistant to Lew Schwartz, owner of the New York publishing company Abelard-Schuman.
[3] Authors he published include David McKee, Tony Ross, Satoshi Kitamura, Quentin Blake and Chris Riddell.
[4] In 1999, Flugge received the Eleanor Farjeon Award for distinguished service to the world of British children's books, the first publisher to be honoured, and he was also the first publisher to be awarded Honorary Membership of the Youth Libraries Group.
[4] In 2016, in honour of the 40th anniversary of Anderson Press, the Klaus Flugge Prize was launched, an award for the most promising and exciting newcomer to children's book illustration.
[5] Flugge is the recipient of the 2023 London Book Fair (LBF) Lifetime Achievement Award.