My Favorite Girls is a full-color illustration collection of Touhou character works by Korean artists Nyanya and Cu-rim. Though I purchased this because of Nyanya's involvement, I quite like Cu-rim's colorful style as well. For Nyanya, this was one of two books that she participated in for Comiket 78.
I'd first noticed Nyanya's art work while I was browsing Pixiv to see various artists' Comiket 77 promotional images right before the event. It wasn't so much the style of the illustration, but rather the cat girl herself, whom is basically an inverse of one that H2SO4 frequently draws that really caught my attention and made me want to buy this.