Two days ago a new book was released for download, called "Ever-changing teachings of Jehovah's Witnesses". It was originally written by a Polish JW scholar (who never was a JW himself) Włodzimierz Bednarski, with a help from Szymon Matusiak, who was a JW and an elder, and is a result of years of labourious work to compile quotes regarding every single doctrine the book describes. It covers the most important changes in years 1879—2015. It can be an invaluable resource for talking with still-in relatives and friends, to show them the extent of changes not only in the first years of Bible Students movement, but also those made recently. Especially when they were changing doctrines back-and-forth.
I hope you'll like it!