By Harvard Students · created by harvard students · H.S. · Inc. Harvard Students Agencies
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| SAT Subject Test Math Level 1 | 978-1-4114-9983-6 (1-4114-9983-2) | 2005 |
| Sparknotes Guide to AP U.S. History | 978-1-4114-0517-2 (1-4114-0517-X) | 2008 |
| Sparknotes Sat Math Workbook | 978-1-4114-0435-9 (1-4114-0435-1) | 2005 |