Using the OCLC Online Union Catalog, the study identified those adult
fiction books owned by the largest number of public libraries in order
to determine if a core collection of titles could be identified for u
se in evaluating adult fiction collections. This list of 406 most held
titles was then compared to a number of standard collection developme
nt lists to examine whether these tools would be useful in predicting
widely held works. With the exception of the Wilson Fiction Catalog, '
'best books'' lists did not perform well in predicting the widely held
titles, nor did bestseller lists. Most of the widely held titles were
published since 1980 and were clearly ''popular'' in nature. Implicat
ions of these findings are discussed and recommendations are made for
further research.