The collections consists primarily of manuscripts of Thayer's works, including personal notes, publisher/editor corrections and correspondence, and some public response. Also included are various newspaper and magazine articles featuring the author.

Contains draft notes for Thayer's work "The First Sunday." This work also may have been titled "Testimony." Materials pertain to the publication, and include consecutive drafts of the work with author's commentary. Also includes correspondence with publishers and responses. Dated circa 1970-2003.

Contains draft notes for Thayer's work "Dolf." Materials pertain to the publication, and include consecutive drafts of the work with author's commentary. Also includes correspondence with publishers and responses. Dated circa 1971-2003.

Contains draft notes for Thayer's work "The Clinic." Materials pertain to the publication, and include consecutive drafts of the work with author's commentary. Also includes correspondence with publishers and responses. Dated circa 1973.

Contains draft notes for Thayer's work "Christopher." Materials pertain to the publication, and include consecutive drafts of the work with author's commentary. Also includes correspondence with publishers and responses. Dated circa 1991-1992.

Contains records of Thayer's correspondence, incoming and outgoing. Letters are both related to Thayer's teaching at Brigham Young University, including discussions with faculty member and business-related information. Also includes letters with Thayer's publishers, discussing recent work, possible future publications, and responses to his works. Dated circa 1988-1991.