Connection: Madoka Magica Illustration Book is a project led by Purinpurin (プリンプリン) that includes illustrations from eight different artists. And all of that sounds good in theory, but there's only one illustration by each artist, making it a rather short collection ^^ But, it was released for the one day event Magi Madoka ONLY - Mou Nanimo Kowaku Nai (魔まマ オンリーイベント~もう何も恐くない~) so there wasn't a lot of turn around time.