From their website:
For more than ten years, the Word of Blake’s Jihad has engulfed the states of the Inner Sphere and the invading Clans in chaos and fire. Reeling from attacks on all fronts, realms have fought one another while the Word’s masters built a powerful Protectorate around humanity’s home: Terra. But with the rise of a resourceful rebel leader, Devlin Stone, the collective might of the Great Houses and rival Clans have united for an all-out assault against the Protectorate—one that can only end when humanity’s home is free once again.
Jihad Hot Spots: Terra continues the Jihad plot book series started with Blake Ascending, bringing readers into the latter years of the war between the Word of Blake and the Inner Sphere. Seen from the eyes of those who fight and die in this epic struggle, this book includes articles and intelligence excerpts from across the Inner Sphere, along with additional rules and campaign tracks for both BattleTech campaigns played using the Total Warfare and A Time of War game rules. This book also provides a rare, in-depth look at the Terran system itself, including the history and varied cultures who live on these most revered worlds. Also included are rules and units for the elaborate defense network the Word of Blake unveiled against Stone and his allied Coalition throughout the Protectorate campaign.