Many academic libraries collect art exhibition catalogues and juvenile books to support the curriculum, but academic library review sources and book vendors have limited coverage of these niche areas. For more than a decade, Wichita State University has used purchase plans from Worldwide Art Books and Junior Library Guild to acquire print books. This paper discusses the assessment of both plans, how experience with this assessment has influenced development of an assessment plan, and reasons other libraries may want to assess their own niche collecting plans.