Twitter user: Yoshihito Kobayashi posted some images of a nice Japanese X Bomber picture book that I've not come across.
Illustrations are apparently done by Hiroshi Kida and are often a composite of an illustrated background and a photograph of one of the ships from the show.
That illustration with the battlecruiser and the exploding volcano is pretty close to the Molthane episode.
The smaller booklet is thought to have accompanied one of the small Yujin-style, vinyl figures that were released at the time of the show. Interestingly, it lists the ages of the characters.
