Jin - CHALLENGE BOOK BT21 Highly valued by ATINY

Highly valued by ATINY

Critics praised the album’s cohesive production and celebratory energy during TWICE’s tenth anniversary era

KATSEYE WILD is the third English language extended play by global girl group KATSEYE

1 received strong commercial response and helped establish BTS’s global presence

This TATA Baby plush pillow is part of the expanding BT21 Baby collection

Jin - CHALLENGE BOOK BT21 Highly valued by ATINYJin CHALLENGE BOOK is an official interactive merchandise release by Jin of BTS, launched on January 26, 2026 through BIGHIT MUSIC and HYBE as part of the #RUNSEOKJIN_EP. TOUR era. Developed around the playful and energetic atmosphere associated with Jins solo activities and fan engagement style, the project combines collectible merchandise with game inspired activities designed for ARMY participation. The release includes a 32 page photobook