Helen Lester is probably best known for her series of books about the mischievous penguin Tacky. She used to be
teach primary school aged children and says on her website that she has taught children who behave like all of her characters, especially Tacky and Pinkerton. She seems to specialise in writing stories that deal with behaviour. Her characters are spirited, but endearing and made even more endearing by Lynn Munsinger's illustrations. If you look at Helen's website and move the cursor you will be affronted by these hyperactive characters and you will see this for yourself.