The pictures capture the frenetic glee with which Miles and Niles go about their day, and add a depth to the characters. Superintendent Barkin's evil character is reinforced by the pictures of him in his striped suit, holding bolt cutters menancingly, and Miles and Niles friendship is shown in simple glimpses of them sitting under a tree or touching fingertips after a prank. There is even a light romance that is shown mainly through the pictures.
Yawnee Valley is a great town, and the descriptions of the local cows and small population are somewhat different than the typical middle grade novel setting. I'm not sure that any rural populations are going to be glad that their cows are painted with green and purple polka dots, but the tone of these novels is flippant and jovial enough to almost make me believe that they would find tourist opportunities to showcase these colorful animals.
Notebook novels are always a popular middle grade choice, and readers who have burned through Peirce's Big Nate, Berger's Lyttle Lies, Moore's King of the Bench series and Bergman and Scotts' Zits novelizations will enjoy reading about Miles and Niles exploits... and maybe even trying to recreate them!