[citation needed] The first book in the series was published in April 2004 and topped the New York Times Best Seller list.
All the characters on the covers (and their styles) match the time period each volume represents.
Volume 25, covering the years 1999 and 2000, also includes the complete run of Schulz's 1947–50 strip Li'l Folks.
A 26th and final volume was announced in 2016 which includes hundreds of miscellaneous sketches, designs, short stories, and covers drawn by Schulz.
Box sets Both the complete series and the Sunday collections are being published in hardback and paperback form, with different covers and supplemental artwork.