Delphi series. Volume I / featuring Anna Leahy, Karen L. George, & Robert Perry Ivey. (OCLC #964631912)

The MARC 505 (Formatted Contents Note) in its basic format contains only one subfield ǂa with a contents note marked up with ISBD punctuation:

505 0_ ǂa Sharp miracles / by Anna Leahy -- The fire circle /
    by Karen L. George -- Letters to my daughter / by Robert
    Perry Ivey.

There are subfields for doing further markup, such as ǂt for titles and ǂr for statement of responsibility, and some ILS will even honor those and index the contents as titles and authors respectively:

505 00 ǂt Sharp miracles / ǂr by Anna Leahy -- ǂt The fire
    circle / ǂr by Karen L. George -- ǂt Letters to my daughter /
    ǂr by Robert Perry Ivey.

This is not the ideal way to index them however; the authors’ names are not in their authorized forms here, the statements of responsibility may include words like “by”, and the titles may include non-filing words like “The”. (There is a subfield ǂg for “Miscellaneous information” which could theoretically be used to “remove” such things, but the MARC documentation specifically says NOT to use it for that purpose.) For this reason, it is best to also include added entries for indexing:

700 12 ǂa Leahy, Anna, ǂd 1965- ǂt Sharp miracles.
700 12 ǂa George, Karen ǂq (Karen L.). ǂt Fire circle.
700 12 ǂa Ivey, Robert Perry. ǂt Letters to my daughter.