Writing Doreen Cronin Other Credits Click, Clack, Moo: Christmas at the Farm Characters 2017 Click, Clack, Ho, Ho, Ho Writer 2016 Dooby Dooby Moo Writer 2007 Diary of a Spider Writer 2006 Diary of a Worm Writer 2005 Duck for President Writer 2004 Diary of a Fly Author 2004 Click, Clack, Moo: Cows That Type Writer 2001 Agent-readable