The Rebels' Assault

The Rebels' Assault is the fourth book in David Grimstone's series. The story follows Decimus Rex and Olu Umbika, who have escaped from Arena Primus and boarded a slave ship to flee from the evil overlord Slavious Doom. However, when their four friends left behind are threatened and used as bait to force their return, Decimus and Olu must devise a plan to rescue their friends while battling Slavious Doom's forces who pursue them.