You've got one room and a reading range that runs from a child still gaining confidence with chapters to one already devouring thick novels, and you need books that can hold all of them at once. This is that shelf. Every title here works on more than one level: the story is strong and clear enough that a striving reader can ride it, and there's enough underneath that your strongest reader stays fascinated. Read one aloud and the whole room is in it; hand it to a child to read alone and it meets them where they are. Pick whichever one fits your class this month and go. Any single book here does the whole job.
Every book here clears one specific bar: it has to work on at least two levels at once, so a single title can hold a striving reader and a strong reader in the same room. That means a clear, propulsive story on top, an animal, a robot, a caged tiger, a dog, so the child still building stamina can follow and finish, and real depth underneath, grief, belonging, what we owe a wild thing, so the advanced reader keeps digging. They're loosely arranged from the most approachable entry to the most demanding, but any one of them satisfies the whole idea on its own. Pick by what your class is ready for and who's in the room: a boy and a rescued skunk, a stray dog in a new town, a gorilla in a mall cage, a robot learning to be a mother, a tiger in the Florida woods, a fox and the boy who has to find him.