hello i have the entire 33 vol set of mysteries of the unknown and this is my favorate book out of them all considering that these books are now over 20 years old i find that there are still some areas of the alien/ ufo stuff that is little menchened even on ufo programs today, like the alligash 4 incident and the ed walters story i found very interesting and even though these book have old and limited info i still think they are very good indeed there are many wonderful photos as well. Richard
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