Again, please note the versions and dates. If it's not on this list, it means I have it. I am missing these:
1919 The Messenger of Laodicea
1925 The Watchtower Radio Stations, WORD & WBBR
1934 Information by the Peoples Pulpit Association, To the Honorable Federal Communications Commission, Broadcasting Division
1934 In Rebuttal—To the Honorable Federal Communications Commission, Broadcast Division
1936 Christianity Is Not Free in the United States of America
1937 Christianity Is Not Free in Lagrange, Georgia
1939 Order of Trial
1966 Kingdom Ministry School Course—Outline of Program and Notes
1977 “Pay Attention to Yourselves and to All the Flock” (first brochure)
1979 “Pay Attention to Yourselves and to All the Flock” (second brochure)
1981 “Pay Attention to Yourselves and to All the Flock” (third brochure)
1982 Dwelling Together in Unity (revised)
1989 Dwelling Together in Unity (revised)
1993 The Government That Will Bring Paradise (revised)
1993 Jehovah’s Witnesses in Greece (large and small editions) (English, Greek)
1994 Planned Giving to Benefit Kingdom Service Worldwide
1995 How to Read and Write (Nigeria)
1996 Dwelling Together in Unity (revised)
1997 A Book for All People
1998 What Happens to Us When We Die?
1999 The Guidance of God—Our Way to Paradise (© 1998) (for Muslims)
2000 When Someone You Love Dies (revised)
2000 Charitable Planning to Benefit Kingdom Service Worldwide
2001 A Satisfying Life—How to Attain It
2004 Charitable Planning to Benefit Kingdom Service Worldwide (revised)
2004 Dwelling Together in Unity (revised)
2013 Jehovah’s Witnesses and Disaster Relief