The Knife's Edge (Craven's War Book 13) by Nick S. Thomas

Battle must be forced upon the enemy, but will they stand and fight? Spain is finally open to Wellington’s army, but the vast French force at Salamanca must be forced into battle before they can be re-enforced further. If they cannot, then Wellington’s army will have no choice but to withdraw back to Portugal once again. All hope lies in deception, and Major Craven is dispatched to destroy a vital bridge through which French communications and re-enforcements travel. The war in Spain in on a knife’s edge as both sides look for a decisive victory to determine whether the British can remain in Spain or be forced out once and for all.