Join Billie and her friends as they embark on an exhilarating adventure to save little children trapped on the ice. Along the way, they unravel the mystery of a lost invention and confront the eerie enigma of a locked school tower. This thrilling tale is the fourth installment in the beloved Billie Bradley series, a captivating mystery collection for young girls.

Join Billie and her friends as they embark on an exhilarating adventure to save little children trapped on the ice. Along the way, they unravel the mystery of a lost invention and confront the eerie enigma of a locked school tower. This thrilling tale is the fourth installment in the beloved Billie Bradley series, a captivating mystery collection for young girls.

Join Billie and her friends as they embark on an exhilarating adventure to save little children trapped on the ice. Along the way, they unravel the mystery of a lost invention and confront the eerie enigma of a locked school tower. This thrilling tale is the fourth installment in the beloved Billie Bradley series, a captivating mystery collection for young girls.