X-Men: The Hidden Years #4

X-Men: The Hidden Years #4 was published by Marvel Comics in 2000 as part of a series written and illustrated by John Byrne. The series was designed to fill the long-standing narrative gap between the original X-Men team's early adventures in the 1960s and their modern revival in Giant-Size X-Men #1. Byrne, who had previously achieved critical acclaim for his definitive runs on the X-Men franchise in the 1970s and 80s, sought to utilize a retro aesthetic and writing style to honor the classic era of the title.

The reception of the series was largely driven by nostalgia, appealing to long-term readers interested in Byrne's interpretation of the original lineup's untold stories. While the book was praised for its technical craftsmanship and commitment to continuity, it existed during a period of significant shifting trends in comic book storytelling. As a result, the title is remembered as a specific, stylized project that functions as a bridge between the classic Silver Age sensibilities and the more contemporary tone of the turn-of-the-millennium comics.