The year 2014 marks 100 years since the end of the "Gentile Times" in 1914 and the beginning of the "last days" of this world system! 
Here is a book that the Watchtower Society has quoted from many times regarding how the "world changed in 1914".  good condition.
"The Generation of 1914"
Robert Wohl discusses the significance of 1914 as a turning point in mankind's history. He tells the stories of five young men of five European countries to recreate the generational consciousness that united them as well as the unique national experience that made them different. This book was printed in 1979 and is in good condition with no writing in it. [307 pages.]

This book is referenced by the Watchtower Society of Jehovah's Witnesses seven times: 

Watchtower, October 15, 1980, page 31
"Let Your Kingdom Come", 1981, page 140
Watchtower, May 15, 1984, page 3
Watchtower, May 15, 1984, page 5
Watchtower, November 1, 1995, page 18
Watchtower, February 1, 2004, page 20
Awake!, April, 2007, page 4

 As a special offer we will send you a copy of the first page of the "World Magazine" August 1914 that mentions how the Watchtower Bible and Tract Society {International Bible Students Association known today as Jehovah's Witnesses} printed that a global time of trouble would occur in the year 1914 decades in advance which as history testifies was the beginning of World War 1 in fulfillment of Bible Prophecy - Matt. 24:3-14, Revelation Chapter 6.

To All Collectors of Watchtower Publications:

        Welcome to our bookstore / museum: WTArchive, a source of Watchtower memorabilia, historical Bibles, books, and research.

   Since the "Proclaimers" book came out in 1993 the desire to have a personal library or museum of Watchtower items has grown.

   We offer here on eBay hundreds of historical Bibles, both original and as facsimiles, such as the Gutenberg Bible, Tyndale and about 250 others. We also offer many original Bible leafs that are hundreds of years old. We offer museum replicas and facsimiles of Biblical artifacts and many other things of interest to Jehovah's Witnesses and others interested in Biblical historical artifacts such as items related to the Divine Name "Jehovah" going back thousands of years. We also have many of the books quoted in publications of Jehovah’s Witnesses and hundreds of photos and reproductions of memorabilia from the 19th to early 20th Centuries such as the Photo-Drama of Creation. We have items such as the Dead Sea Scrolls and other replica artifacts from Bible times. Many people are interested in copying to the best of their ability the Bethel Library including the thousands of books referred to and quoted from in the many publications of Jehovah’s Witnesses for research. We have books dealing with the following topics:

Hundreds of Bible Translations,

Biblical Reference Books,

Early Christianity,

History,

Science,

Pagan Origins,

Archaeology,

Jehovah's Witnesses,

Holocaust,

Books related to prophecy about 1914,

Books by or about Jehovah's Witnesses,

Blood transfusion alternatives,

and many other subjects.

If you are one of Jehovah's Witnesses, I encourage you to donate theocratic historical items if you can and if you are not a Witness, then I encourage you to continue to search God's Word the Bible and related publications to guide and aid you in your search for Jehovah God your Creator.

   According to our Scriptural conscience and Biblical principle to receive free and give free no recent or new publications are ever sold here on eBay which can be obtained for free at a Kingdom Hall.

"This means everlasting life their coming to know you, the only true God, and of the one whom you sent, Jesus Christ" John 17:3

"And this good news of the Kingdom will be preached in all the inhabited earth for a witness to all the nations, and then the end will come" Matt. 24:14. {New World Translation 2013 Edition}.