Note: Not all fake books or real books have the same format, most will have sheet music with chords marked, some also have lyrics, a few have tablature, they are sometimes also available in different keys and arrangements to suit different instruments.
For an excellent collection of fakebooks to buy, checkout www.sheetmusicplus.com, who have a selection of some 1200+ to chose from, they also have good search facilities AND include content indexes for their books.
O Thou My Soul, Bless God The Lord
O Thou Who Camest From Above
O Thou, In Whose Presence
O To Be Like Thee!
O Trinity Of Blessed Light
O Very God Of Very God
O waly, waly
O Waly, Waly
O What Their Joy And Their Glory Must Be
O Woman Washing By The River
O Wondrous Sight! O Vision Fair
O Word Of God Incarnate
O Word Of God Incarnate composed by Felix Mendelssohn