id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ital-10738	Costello, Eamon; Bolger, Richard; Soverino, Tiziana; Brown, Mark	Determining Textbook Cost, Formats, and Licensing with Google Books API: A Case Study from an Open Textbook Project	2019-03-18	9	.pdf	application/pdf	2910	122	55	Digital Formats and Public Domain License Figure 4 shows the numbers of PDF (1,219) and e-book (1,016) versions of books reported to be available. However, there is little known about the monetary face value of books that students are expected to buy, beyond studies based on self-reported data.	cache/ital-10738.pdf	txt/ital-10738.txt