Frontline correspondent and Harvard University professor Henry Louis Gates, Jr. Gates hosts a Frontline segment called "Two Nations of Black America" which airs Tuesday night on PBS. Today, America has the largest black middle class in its history, yet half of all black children are born into poverty. (Interview by Barbara Bogaev)

Linguist and author Naomi S. Baron. Her book, "Growing up with Language" (Addison-Wesley publishers, 1992) examines the process by which children learn to use language. Baron is Professor of Linguistics and associate dean in the College of Arts and Sciences at the American University in Washington DC. (Interview by Barbara Bogaev)

Lawrence Wright has just written the new book "Twins and What They Tell Us About Who We Are". It is published by Wiley. In his book, he explores how research on twins is helping us understand how genetics shapes our lives. Wright is a staff writer for the New Yorker. (Interview with Barbara Bogaev)

Computer software engineer and NPR commentator Ellen Ullman. Her book is titled "Close to the Machine" (City Lights). It's her semi-autobiographical account of a computer programmer trying to reconcile her work -- machines and information -- with the need for human contact and the feel of living in the real world. (Interview by Barbara Bogaev)

New York Times Science Correspondent Sheryl Gay Stolberg talks about the comeback of the drug Thalidomide. In the 1960s the drug was banned worldwide after it produced a generation of babies with missing and stunted limbs. But it is now showing promise in treating leprosy and several other ailments including AIDS. (Interview by Barbara Bogaev)

Author and Professor of Law, James Boyle. What are intellectual property rights and who owns your genetic information? In his book "Shamans, Software and Spleen" (Harvard University Press), James Boyle explores the dilemmas posed by the information age - the ethical, legal and economic implications of who owns and controls access to information. (Interview by Barbara Bogaev).

Author Cheryl Pearl Sucher is the daughter of holocaust survivors. Her debut novel, The Rescue of Memory (Scribner), draws on her own experiences. It is about a young woman who must come to terms with the impact of the holocaust on her parents and her aunt, who were victims of the camps. (Interview by Barbara Bogaev)

Health care analyst and substance abuse expert Joseph Califano. He was LBJ's assistant for domestic affairs from 1959-65 and Secretary for Health, Education and Welfare under Jimmy Carter from 1977-79. Joseph Califano is also president of the Center on Addiction and Substance Abuse, a research and experimental care facility at Columbia University. (Interview by Barbara Bogaev)

British standup comic Eddie Izzard. The cross-dressing comic is a household name in England, but little known here. His new one-man show is "Dress to Kill" (at New York's Westbeth Theater, in the West Village). A New York Times review describes him as "a ticklingly entertaining hybrid of mainstream cultural influences and offbeat personal tendencies." (Interview by Barbara Bogaev)

Dr. Jonathan Tucker is the Director of the Chemical & Biological Weapons Nonproliferation Project based in California. In 1995, Tucker was a member of a biological weapons inspection team in Baghdad for the United Nations. He'll talk about obstacles facing the newest round of inspections in Iraq. Tucker has also served on the Presidential Advisory Committee on Gulf War Veterans' Illnesses. (Interview by Barbara Bogaev)

Journalist Pete Hamill. He's written a new book, a long essay really, about the troubled state of newspapers in this country. It's called "News is a Verb: Journalism at the End of the Twentieth Century" (The Library of Contemporary Thought, The Ballantine Publishing Group). Hamill is also the author of the bestselling novel, "Snow in August," and the memoir, "A Drinking Life." (Interview by Barbara Bogaev)

British writer Ian McEwan's 1997 novel "Enduring Love" has been published in the United States. (Doubleday) McEwan has written five other novels: "The Cement Garden," "The Comfort of Strangers," "The Child in Time," "The Innocent," and "Black Dogs," He's been shortlisted for Britain's prestigious Booker Prize twice and has won the Whitbred Novel of the Year Award. He lives in Oxford, England. (Interview by Barbara Bogaev)

Playwright, novelist, and screenwriter Paul Rudnick. Paul discusses his new movie, "In & Out," starring Kevin Kline -- the story of a high school English teacher "outed" on national t.v. by a former student, much to the surprise of everyone. Rudnick is the author of such plays as "I Hate Hamlet," "The Naked Eye," and "Jeffrey." He also wrote the screenplay for "Addams Family Values." (Interview by Barbara Bogaev)

Meredith F. Small has written the new book "Our Babies, Ourselves: How Biology and Culture Shape the Way We Are". (Anchor books) Small explores the various cultural practices used in raising babies. She is also the author of "Female Choices: Sexual Behavior of Female Primates" and "What's Love Got to Do With It?" Small is a professor of anthropology at Cornell University in New York State. (Interview by Barbara Bogaev)

Writer Dorothy Allison. Her bestselling novel "Bastard Out of Carolina," was about a poor South Carolina family's violence and incest, and was largely autobiographical. She says that she doesn't like most abuse literature because it tends to eroticize abuse. Allison has also written a book of short stories called "Trash" and a book of poems called "The Women Who Hate Me." Allison's new novel is "Cavedweller" (A Dutton Book) (Interview by Barbara Bogaev)

Patrick Murphy is the Public Guardian of Cook County, Illinois. He represents abused or neglected children in Chicago’s . In his new book Wasted: The Plight of America’s Unwanted Children (Ivan R. Dee, Inc) he argues that while keeping families together may sound like good public policy, there are many cases in which it only endangers the lives of children. His previous book is titled Our Kindly Parent the State. (Viking) (Interview by Barbara Bogaev)

Reporter Malcolm Gladwell of the New Yorker speaks about the Spanish influenza of 1918. Gladwell's article in September 29th's New Yorker explores the medical potential of seven buried bodies stricken by this flu. Lodged in the Arctic tundra, the bodies, soon to be exhumed, may hold clues on how to prevent a similar epidemic in the future. Gladwell is the former New York bureau chief of the Washington Post. (Interview by Barbara Bogaev)

Tara VanDerveer coached the Olympic gold medal-winning U.S. Women’s basketball team. The team’s performance drew large crowds and secured the formation of two professional U.S. women’s leagues: the WNBA and the ABL. VanDerveer has written a book about her own experience as a woman in sports. Its called “Shooting from the Outside: How a Coach and her Olympic Team Transformed Women’s Basketball.” (Avon Books) VanDerveer now coaches the Stanford University Women’s basketball team. (Interview by Barbara Bogaev)

Documentary filmmaker Nicholas Clapp. His new book, "The Road to Ubar: Finding the Atlantis of The Sands" (Houghton Mifflin) is about his search for the lost Arabian city of Ubar. Described in the Koran as "the many-columned city" Ubar, was said to have been destroyed by God for the sins of its people. Using satellite maps to help locate it, Clapp organized two expeditions to Arabia to find Ubar. And he found it in 1992. (Interview by Barbara Bogaev)