“How to Cheat at Photoshop” or “100% Photoshop” both books by Steve Caplin https://www.amazon.com/Steve-Caplin/e/B001IGJLXM/ref=sr_ntt_srch_lnk_1?qid=1470723848&sr=8 -1

Amazon.com: Steve Caplin: Books, Biography, Blog, Audiobooks, Kindle

“Photoshop Layers” by Matt Kloskowski

Amazon.com: Matt Kloskowski: Books, Biography, Blog, Audiobooks, Kindle

“Adobe Photoshop Classroom in a book”

https://www.amazon.com/s/ref=nb_sb_ss_i_1_16?url=search-alias%3Dstripbooks&field-keywords= adobe+classroom+in+a+book&spre…

(free)
http://creativesuitepodcast.com/
http://kelbytv.com/
http://tv.adobe.com/
photoshop step by step for beginners – YouTube http://www.youtube.com/
http://terrywhite.tv/

(pay)
Kelbyone – 10 day free trial
http://kelbyone.com/subscribe/ http://kelbyone.com/

Lynda.com – 10 day free trial
Software training & tutorials – The lynda.com library

Private and online training
https://www.rockymountaintraining.com/