Secret Mark
Author: first_name:  Roy J.
last_name: Snell
Language: English
Year: 1923

Student Lucile Tucker works part-time at the library of the large university she attends in Chicago to help pay her tuition. One night, while closing the library for the evening, she glimpses a small child – a girl – in the stacks. Carefully following her, Lucile can’t believe her eyes when the child, unaware that she has been seen, manages to steal a valuable book from the collection and practically disappear from the library right before Lucile’s eyes. This is only the beginning of her search