Peter Lerangis, born in Brooklyn, New York in 1955, is an American author primarily writing for children and young adults. He is widely recognized for his "Seven Wonders" series, with all five installments reaching The New York Times Best Seller list for Children's Books. Lerangis also contributed significantly to "The 39 Clues" series, authoring "The Viper's Nest" and "The Sword Thief," as well as parts of "Vespers Rising" and "Cahills Vs. Vespers."

His extensive bibliography includes numerous other series such as "Watchers," "Antarctica," "Abracadabra," "Spy X," and "Drama Club." Lerangis has also ghostwritten for well-known series like "The Three Investigators," "Hardy Boys Casefiles," "Sweet Valley Twins," and "The Baby-Sitters Club," often under the pseudonym A. L. Singer. His work extends to novelizations of film screenplays and video games. Lerangis studied biochemistry at Harvard University, where he was also involved in musical theater and a cappella. After graduating, he worked as an actor and copy editor before dedicating himself to writing.

Peter Lerangis has established a prolific career in children's and young adult literature. His "Seven Wonders" series achieved significant commercial success, with all titles appearing on The New York Times Best Seller list for Children's Books. He played a key role in the popular "The 39 Clues" franchise, contributing to multiple books within the main series and its subsequent arcs. Beyond these major series, Lerangis has authored a diverse range of books, including historical novels like "Smiler's Bones," and young adult titles such as "Somebody, Please Tell Me Who I Am." His creative output also encompasses series like "Watchers," "Antarctica," and "Drama Club," showcasing his versatility across different genres and age groups.

A substantial portion of Peter Lerangis's published work has been through ghostwriting or novelizing existing media. He has lent his writing talents to numerous popular series, including "The Three Investigators," "Hardy Boys Casefiles," "Sweet Valley Twins," and extensively for "The Baby-Sitters Club" and its spin-offs. Under the pseudonym A. L. Singer, he has penned novelizations for a variety of films such as "The Sixth Sense," "Sleepy Hollow," and "Beauty and the Beast," as well as for video games in the "Worlds of Power" series. This aspect of his career highlights his ability to adapt and write within established fictional universes and character frameworks.

Born in Brooklyn, New York, in 1955, Peter Lerangis was raised in Freeport, New York, on Long Island. His parents were a retired employee of the New York Telephone Company and a retired public-elementary-school secretary. Lerangis pursued higher education at Harvard University, where he majored in biochemistry. During his time at Harvard, he was actively involved in performing, participating in musicals and singing with the a cappella group, the Harvard Krokodiloes. Following his graduation, he moved to New York City and worked for eight years as an actor and freelance copy editor before transitioning to a full-time writing career.

Peter Lerangis has been recognized on an international stage for his literary contributions. In 2003, he was selected by First Lady Laura Bush to represent American authors at the first Russian Book Festival in Moscow, an event attended by prominent authors like R. L. Stine and Marc Brown. Additionally, in 2016, Lerangis was an invited speaker at Bal Sahitya Mahotsav, the inaugural children's literature festival held in Patan Dhoka, Nepal. His books have also received critical acclaim, with several recognized as notable selections by organizations such as the American Library Association and the Junior Library Guild, and inclusion in lists like the New York Public Library Best Books for Teens.