Inter World by Neil Gaiman

In a thrilling blend of science fiction and fantasy, a young boy named Joey Harker discovers his unique ability to walk between dimensions, finding himself in a universe where multiple versions of Earth exist. As he navigates this multiverse, Joey encounters a diverse group of alternate versions of himself, each possessing their own distinct powers. Together, they form an alliance to combat the sinister forces of magic and science that threaten to dominate all worlds. Through courage and teamwork, Joey embarks on a journey of self-discovery, realizing the power of unity in the face of overwhelming odds.