Final answer:
The specific book that Jane reads while hidden behind the curtains at Gateshead is not detailed in the text of Charlotte Brontë's 'Jane Eyre'.
Step-by-step explanation:
The book Jane reads while hiding behind the curtains at Gateshead is not specified in Charlotte Brontë's novel Jane Eyre. The scene you're referring to is early in the book where young Jane finds solace in reading, using her imagination to transport herself away from the harsh realities of her life living with her cruel aunt and cousins. This act reflects her desire for knowledge and her introspective nature, which are central themes throughout the novel.