The martyrs of Golbanti : or missionary heroism illustrated in the lives of Rev. John and Mrs. Houghton, of East Africa / by Robert Brewin.

http://www.archive.org/details/martyrsofgolbant00brewiala

Missions and martyrs in Madagascar.

http://www.archive.org/details/missionsmartyrsi00bostiala

Thoughts from modern martyrs/ edited and arranged by James Anthony Walsh.

http://www.archive.org/details/thoughtsfrommode00walsuoft

Missionary heroes : stories of heroism on the mission field / edited by Charles D. Michael.

http://www.archive.org/details/missionaryheroes00unknuoft