The first accessions (A.90-20, A.90-38, A.0-48, A.91-54) are divided into three series: personal, publications, and politics. The personal series contains Holt's university essays. The publication series contains material pertaining to Holt's four published books and her newspaper career. Politics contains her correspondence as an MP.
The second accession (A.05-53) is divided into thirty-one series. They include biographical information and journals, Leon Holt material, Milner family, writing and research, unpublished material and manuscripts, her autobiography material, Johnathan Pollard research material, First Force manuscript, Council for the Damned manuscript, child violence research, drug research, women's research, justice system research, research material on Asia, Democratic Party research, National Parole Board, Liberal Party material, miscellaneous research, her articles, speeches and workshops, television projects and courses taught, academic material, awards, House of Commons, correspondence, lawsuits and complaints, writing by others, oversize material, map cabinet material, photographs, and tapes.
The third accession (A.07-14) is divided into five series and contains material pertaining to the court case Supreme Court of British Columbia - Simma Holt v. Thomson aka Sonja d. Fletcher Coronation Real Estate Services Ltd. d.b.a. Royal Lepage Coronation West Realty, and Ada Van Leeuwen.
The fourth accession (A.10-88) is divided into 8 series. They include: biographical & family material, diaries & journals, manuscripts & columns, correspondence, Gerald Eaton murder case, leaky condo material, photo collection (PC 103) and tape collection TC 103).