In Volume Nine, Defenders of the Mission, Ranger Tim Bannon and his trusty horse, Rowdy, have been following a bad guy named Chuck Morrell all across Texas, north to south and east to west. He nearly catches up with the outlaw when he comes down with an influenza.
He manages to make it to the Mission of Santa Clara, but he's laid low by the bug. He's afraid he's lost Morrell for sure, but there's not much he can do about it until he has a bit more strength than the average new-born kitten. He's just getting back on his feet when outlaws attack the mission, hot on the heels of.... (Nope, not gonna tell ya.)
eBook A Ranger Named Rowdy - A Texas Ranger Tim Bannon Story - Volume 9 - Defenders of The Mission