It is often assumed that picture books are intended for young children and that they are therefore mainly concerned with safe and reassuring stories, say, about home and family, friends and starting school. There are many picture books which fit within this category, but the form itself, a 32-page format which developed during the 1960s from illustrated books, has always been peculiarly open to experimentation and has enlarged its audience to include older children and adults. Unlike the novel, the picture book is not weighed down by the practices and conventions of the past; and the combination of verbal and visual texts makes for a particularly complex genre as it constructs ideas through dialogical relations between words and pictures.