I'm planning on leaving March of 2017, and I currently have the AWOL Northbound guidebook for 2016 (http://www.amazon.com/The-A-T-Guide-Northbound-2016/dp/0982980892/ref=pd_bxgy_14_img_2?ie=UTF8&refRID=1ARR15FJ8SDAJX 3SZ1KM), but there's another prevalent guidebook that claims to be the official guidebook (http://www.amazon.com/dp/1889386960/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=2PP9 2F50YIGH9&coliid=I2BEOK0HL5ZHW5). Which of the two should I actually take (obviously the 2017 version of either) on my thru-hike, or is there another guidebook you use? Thanks for the input!