If you have a PDF of the book, you can use the File > Properties menu option to bring up a dialogue window, then click on that window’s Fonts tab. That will display a list of all the typefaces used in the document.
If you have Acrobat Pro, you can access the Edit PDF tool, highlight a line of the text whose typeface you want to identify, and the typeface name will be displayed at the top of the sidebar at the right side of the document.