This is a Japanese (or English) language magazine about comics.
Here's volume 20 of the exciting "Air Gear" manga by Ito Ougure (a.k.a. Oh! great), offered as a limited-edition set that includes the emblem pins of Simca, Spitfire, and Agito! Printed in black and white. All text is in Japanese with furigana for the kanji-impaired.
A normal-edition version of the manga has also been produced, linked below!