Middle-grade books with Muslim characters are a rarity. If you have a Muslim reader who yearns to see themselves in books, these middle-grade books with Muslim characters are a good start. They, of course, also make for excellent windows into the lives of others, though different from ours. Beyond practicing Islam though (which is a small fraction of these books' contents), these stories cover a wide range of themes from sports to immigration to food and friendship.
In most of the books I've listed below, the main characters are practicing Muslims, some even donning the hijab. Some of these books show the challenges teens face as a result of culture. Others show the struggles resulting from Islamophobia. But many of them just show teens living their lives in the 21st century.