Walter Retan's most popular book is The Busy, Busy World of Richard Scarry with 1 save and an average rating of 5.
Series
2 released booksAuthored 50% of series
The Little Engine That Could is a 2-book series with 2 released primary works first released in 1930 with contributions by Watty Piper, Walter Retan, and Francese Mateu.