Nate the Great and the Big Sniff by Marjorie Weinman Sharmat and Mitchell Sharmat illustrated by Martha Weston

Sludge is lost!  Nate usually depends on Sludge to help him solve cases.  Can Nate find his faithful helper?
My first grader read this book to himself.
-Borrowed from the library.
Perfect for transitional readers.
Guided Reading Level: K (2nd grade)