

Cover image
This is the cover for The Alien Factor.
- Series: Hardy Boys and Tom Swift Ultra Thrillers, Volume: #2 (view list of titles in this series)
![]() |
Image source: <a href='http://www.amazon.com'>amazon.com</a>
This is the cover for The Alien Factor.
![]() |
Image source: <a href='http://www.amazon.com'>amazon.com</a>