A good introduction/overview to neural network theory: Deep Learning by Ian Goodfellow, Yoshua Bengio and Aaron Courville (Free, online copy)
A good introduction/overview to neural network theory: Deep Learning by Ian Goodfellow, Yoshua Bengio and Aaron Courville (Free, online copy)
www.deeplearningbook.org
Deep Learning
I found this book a very good reference when learning about autoencoders