Nistar is a 116-page full col­or graph­ic nov­el about a super­hero for chil­dren fight­ing can­cer based on Jew­ish lore and mys­ti­cism. Nistar is an excit­ing sto­ry of a young doc­tor, JJ Barak, who dis­cov­ers the Tso­har, a mys­ti­cal stone with untapped pow­ers. He attempts to har­ness its pow­ers and save the life of a child with can­cer. His jour­ney takes him out of the can­cer ward and into a par­al­lel realm called Nistar (Hebrew for ​“hid­den”), a place where a per­son­’s thoughts, dreams, fan­tasies and inter­nal strug­gles actu­al­ly have a phys­i­cal form. Nistar draws on Frimer’s own expe­ri­ence with can­cer, her knowl­edge of Jew­ish and kab­bal­is­tic sources and her love of com­ic books. The book is illus­trat­ed by renowned com­ic book artist Josef Rubin­stein and Associates.