Breathing underwater / Lisa Davidson and Ralph Petty. (OCLC #921863615)
A book of text having illustrations is always sufficient to justify an additional content type of still image:
336 __ ǂa still image ǂb sti ǂ2 rdacontent 336 __ ǂa text ǂb txt ǂ2 rdacontent
but it makes sense when those illustrations are a substantial part of the content, to the point that the artist is listed jointly as a creator in the statement of responsibility. We can also include an access point for the artist and designate them as such so that respective roles are clear:
100 1_ ǂa Davidson, Lisa, ǂd 1955- ǂe author. 700 1_ ǂa Petty, Ralph, ǂe artist.