This is the Mini Setting Materials Collection (ミニ設定資料集), a limited-edition promotional booklet exclusive to the Amazon co jp bundled set of Mobile Suit Moon Gundam volumes 1 and 2 (released in September 2018).
moon gundam series
1/144 Amuro Ray’s Rick Dije
1/144 Amuro Ray’s MSK-008R Rick Dije 3D Print Out Parts Full Kit: Info and first images by Studio-Infini
RG Gundam GP01 Kai Over custom build
RG 1/144 Gundam GP01 Kai Zephyranthes Over custom build: info, images and credits
HGUC 1/144 Theta Plus garage kit
HGUC 1/144 MSZ-010A1 Theta Plus garage kit: many images, info
HGUC Dag Doll scratch built
Scratch built HGUC Dag Doll (Moon Gundam Series): images, info