Military Cryptanalytics (or MILCRYP as it is sometimes known) is a revision by Lambros D. Callimahos of the series of books written by William F. Friedman under the title Military Cryptanalysis. It also contains contributions by other cryptanalysts. It was a training manual for National Security Agency and military cryptanalysts. It was published between 1957 and 1977, though parts I and II were written in 1956 and 1959.
This essential series of books about cryptanalysis has now been declassified by the NSA and you can download the PDF's of them directly from the NSA website.
The Crypt below is one of the many more unusual ones described in one of the books.
You don't have to be a professional cryptographer, nor run any hill climbing/ Index of coincidence, though not saying those won't help 
The Crypto:
OADROIV UEYOKXB WHUGSXH VOFOGOG KXOGGMA FGMHBVQ ODBWGGP MGTGSSY VTUMGHB SZOBMTU GBZOONO MIVNX
You can validate your puzzle solution with certitude.
