Frog on his Own by Mercer Mayer

From chapters.ca:
On a walk in the park with his friends, Frog decides to do some exploring on his own.

One Frog too Many by Mercer and Marianna Mayer

From chapters.ca:
A Boy, a Dog, and a Frog, the first book in this series, launched Mercer Mayer's distinguished career over twenty- five years ago, and also helped to create the wordless picture book genre. Full of warmhearted mischief and play, the books express the humorous trials and tribulations of friendship and the joy of summertime discovery. Readers will want to collect the entire set.

The King has Goat Ears by Katarina Jovanovic, illustrated by Philippe Beha

From chapters.ca:
In this lively retelling of a Serbian folktale, each barber who cuts the king's hair ends up being kept prisoner in the palace. One day, however, a young apprentice named Miro accepts the challenge to cut the king's hair. When he discovers that the king has goat ears, Miro is careful not to tell anyone. But alas, secrets have a way of being found out! What will the king do when he learns that everyone in town knows his secret?