La venganza de Roma: Libro XXIII de Quinto Licinio Cato — Simon Scarrow (Spanish edition, Edhasa).

Set in 61 AD, Roman Britain is still burning after a brutal uprising, and peace feels like a lie.  The defeated tribes have not truly surrendered, and their leader, Boudica, remains at large with warriors who refuse to accept Rome’s rule.  Worse for Roman pride, the rebels hold a powerful trophy: the eagle standard of the Ninth Legion—proof, displayed for all to see, that Rome can be hurt and humiliated. 
For the Roman army, the cost has been devastating: cities in ruins and losses that can’t be counted.  Veteran centurion Macro carries the war personally, grieving the death of his mother in the attack on Londinium and burning with a need for justice.  Alongside him, Prefect Cato receives the same grim objective: track down the remaining rebel forces and end the threat for good.  There can be no real stability while the queen lives free—and no restored honor until the legion’s eagle is recovered. 
La venganza de Roma is Book 23 in the Quinto Licinio Cato series, written for readers who want large-scale Roman military action mixed with human stakes, duty, and hard choices.  It’s a strong fit for fans of historical adventures focused on legionary life, command decisions under pressure, and the unforgiving politics of empire.