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Language · book
Still in print: the link goes to a shop that sells it.
Graded Tausug texts with glossaries, for learners who have the grammar.
This reader of Tausug texts was written by Wilma A. Amil, Nurylyn M. Jupackal, Fahkriemar H. Limpasan and Peria S. Ledesma, and edited by the linguist R. David Zorc. Dunwoody Press of Springfield, Virginia, brought it out in 2011. It runs to 252 pages and includes a bibliography. Dunwoody had earlier published Intensive Tausug, a teaching grammar of the language of Jolo by Carl Rubino, in 2006.
From openlibrary.org, linguistlist.org.

2005Out of print
Surat SugSamuel K. Tan
The Sulu Sultanate’s own correspondence in Jawi, transcribed and translated in two volumes: letters to Spain, Britain and its own datus from the last century of its independence.
1995Out of print
Maranao StoriesHoward P. McKaughan
Maranao folktales translated into English, from the linguist who compiled the Maranao dictionary.
2013Out of print
Panitikang MëranawSandor B. Abad
Maranao legends and tales, in Maranao and Filipino, for the Commission on the Filipino Language.

1967In print
A Maranao DictionaryHoward P. McKaughan and Batua A. Macaraya
The standard Maranao–English dictionary, compiled by an American linguist and a Maranao lexicographer.
1986Out of print
A Maguindanaon DictionaryRobert E. Sullivan, OMI
The fullest Maguindanaon dictionary, by an Oblate missionary at Notre Dame University in Cotabato City.

1975Out of print
Tausug–English DictionaryIrene U. Hassan, Seymour A. Ashley and Mary L. Ashley
The standard Tausug–English dictionary, from the Summer Institute of Linguistics; second edition 1994.

2005In print
Intensive TausugCarl R. Galvez Rubino
A full course in Tausug grammar for the serious learner.
2009In print
Maranao ReaderJason William Lobel
36 news articles and essays in Maranao, each with an English translation, for learners of the language.
2009In print
Maranao Dialogs and DrillsAlmahdi G. Alonto
Conversational Maranao in dialogues and drills.
2009In print
Maguindanao Grammar SupplementRuth Stickney
A grammar sketch of Maguindanaon for learners.