Larry Lempert has an extensive background within the field of children’s libraries, both as senior children's librarian, and as children's and youth adviser. For many years, he lead the International Library in Stockholm, which was appointed “Library of the Year” in 2011. He is former head of the "Stockholm Year of Reading", a citywide project intended to encourage reading among all age groups and to develop new working methods to promote reading.
Larry Lempert has been a committee member of IBBY Sweden (International Board on Books for Young People) and editor of the IBBY Sweden newsletter. He is formerly a member of the jury of the major Swedish literary award the August Prize and on the board of the Swedish Institute for Children's Books (SBI). Furthermore, he is past member of the Swedish Arts Council’s working group on support for children's and youth fiction and comics. For much of the 1990s, Larry Lempert was a committee member of IFLA's (International Federation of Library Associations) children's literature section.
Larry Lempert has delivered lectures and presentations on children's libraries and literature in Sweden to seminars and conferences for authors, librarians and researchers worldwide. He regards libraries as meeting places for people and new ideas, and library work as a way of encouraging reading and stimulating imagination and knowledge.