Comanche Moon Falling: The Lone Star Reloaded Series, Book Two

Will defied history and saved the Alamo. However, before the celebration even gets started, proof of a Comanche uprising the likes of which have never been seen before force Will to scramble for a solution to keep the frontier from going up in flames.

This time, he doesn't know what the future holds. But he might be able to find an invention to give his troops a fighting chance, assuming there's enough time and his enemies don't kill him or remove him from command.