sentences:  Besides Schulz's work, each book contains an introduction by an influential individual (often with a connection to Schulz), an index of themes and characters, additional art by designer Seth (all of which is directly based on a specific "Peanuts" panel), and a biography of Schulz written by series editor Gary Groth.In addition, the first volume contains an interview with Schulz conducted by Groth and an extended biography.Sunday panels, which originally appeared in color, are presented in black and white in the series (a decision approved by Schulz's widow, Jean Schulz).