Audiobooks are usually distributed on CDs, cassette tapes, or digital formats (e.g., MP3 and Windows Media Audio). The term "books on tape" is frequently used as a synonym for audiobooks, but cassette tapes are no longer the dominant media for audiobooks. In 2005, Cassette-tape sales made up roughly 16% of the audiobook market, with CDs sales accounting for 74% of the market, and downloadable audio books accounting for approximately 9%. In the United States, the most recent sales survey (performed by the Audio Publishers' Association in the summer of 2006 for the year 2005) estimated the industry to be worth 871 million US dollars. Current industry estimates hover at around two billion US dollars per year. Most new popular titles put out by the major publishers are available in audio book format simultaneously with publication of the hardcover edition. There are approximately 25,000 current titles on cassette, CD, or downloadable format. Unabridged audiobooks are word for word readings of a book, while abridged audio books have text edited out by the abridger. Audiobooks also come as fully dramatized versions of the printed book, sometimes calling upon a complete cast, music, and sound effects. Each spring, the Audie Awards are given to the top nominees for performance and production in several genre categories. There are quite a few radio programs serializing books, sometimes read by the author or sometimes by an actor, most of them on the BBC.

Kathy Reichs is a forensic anthropologist for the Office of the Chief Medical Examiner, State of North Carolina, and for the Laboratoire des Sciences Judiciaires et de Médecine Légale for the province of Quebec. She is one of only fifty forensic anthropologists certified by the American Board of Forensic Anthropology and is on the Board of Directors of the American Academy of Forensic Sciences. A professor of anthropology at The University of North Carolina at Charlotte, Dr. Reichs is a native of Chicago, where she received her Ph.D. at Northwestern. She now divides her time between Charlotte and Montreal and is a frequent expert witness in criminal trials. Her work as a forensic anthropologist is internationally recognized. She has traveled to Rwanda to testify at the UN Tribunal on Genocide, helped identify individuals from mass graves in Guatemala, and done forensic work at Ground Zero in New York. For her work with CILHI she has identified war dead from World War II; from all of Southeast Asia – she even examined the remains from the tomb of the Unknown Soldier.

Jim Dale has received multiple awards for this achievement. During Queen Elizabeth II's 2003 Royal Birthday Honours, Jim Dale was named an MBE (Member of the Order of the British Empire) for narrating the (then) five Harry Potter audiobooks and "promoting English children's literature." On a more plebian plane, he's also the Guinness World Record holder for Most Character Voices in an Audiobook--for the 134 different beings he portrayed in HARRY POTTER AND THE ORDER OF THE PHOENIX. The Harry Potter audiobooks have been nominated for Grammy Awards--HARRY POTTER AND THE GOBLET OF FIRE won in 2000 for Best Spoken Word Album for Children--and Audie Awards--in 2004 ORDER OF THE PHOENIX won the Audie for Children's Title for Ages 8+ as well as Audiobook of the Year--and this year, the Harry Potter series was the first recipient of the Audio Publishers Association Hall of Fame Award. Jim Dale has received a variety of stage and screen credits beginning in the 1960s. Among the highlights, he received an Oscar nomination for writing the lyrics to the film "Georgy Girl" (1966), and he starred on Broadway in "Scapino!" (1974) and "Barnum" (1981), receiving both a Tony Award and a Drama Desk Award for the title role.

When Simon Vance was about 10 years old, his father gave him a tape recorder, and he’s been “playing with a microphone and making silly voices” ever since. Began a broadcasting career at BBC Radio Brighton during the summer break of 1976 while studying at Leeds University (and joining in the fun at 'Network 4' - the student TV/Radio society).After graduating took on a full time job at BBC Radio Brighton - moving a couple of years later to London where, for the rest of the decade became a newsreader and presenter for BBC Radio 4 -- the BBC's national speech-based network. Discovered a knack for narrating audiobooks by working for the Talking Book Service of the Royal National Institute for the Blind. Simon won the 2006 Audie Award for Science Fiction for Richard K. Morgan’s MARKET FORCES. “You venture into so many different worlds. From week to week you don’t know which planet you’re going to be on, which country you’re going to be in.” Simon estimates he’s “closing in on 300” audiobooks. He just finished recording THE SECRET RIVER, an Orange Award winner by Kate Grenville.