But he is most famous for a series of his own children's works.  
A graduate of Trinity College, Cambridge, in 1906 he joined the staff of Punch.  A popular playwright, his plays Mr. Pim Passes By and Michael and Mary were very successful.  He also wrote one memorable detective novel, The Red House Mystery, and a children's play, Make-Believe.  In addition, he adapted the Wind and the Willows for the stage as The Toad of Toad Hall.  But he is most famous for a series of his own children's works.  FTP, name this author of When We Were Very Young, Now We Are Six, and The House at Pooh Corner.
A graduate of Trinity College, Cambridge, in 1906 he joined the staff of Punch.  
A.A. Milne