Horace and Morris but mostly Dolores

Horace and Morris but mostly Dolores 
by James Howe 
illus. by Amy Walrod 
Language: English 
New York : Atheneum Books for Young Readers, ©1999. 
1 v. (unpaged) : col. ill. ; 26 cm. 
ISBN: 068931874X ; 9780689318740 ; 9781591123422 ; 1591123429 ; 068985675X ; 9780689856754 
Summary: Three mice friends learn that the best clubs include everyone. 
Available: http://www.primaryconcepts.com/bkaudiocass/horace-morris-delores-rd-along-cass.asp