I wrote a short book titled “Keras Succinctly” that was published a few days ago. You can get the book in PDF format for free. See https://www.syncfusion.com/ebooks/cntk-succinctly.

Book Web site

The book has seven chapters, and each chapter describes how to solve a particular kind of problem:

Chapter 1 - Getting Started (Installation)
Chapter 2 - Multiclass Classification
Chapter 3 - Regression 
Chapter 4 - Binary Classification 
Chapter 5 - Image Classification (CNN)
Chapter 6 - Sentiment Analysis (LSTM) 
Chapter 7 - Autoencoders

The first paragraph of the book is:

Keras is an open source neural network library written in the Python language. Keras requires a backend engine and can use TensorFlow, CNTK (Microsoft Cognitive Toolkit), Theano, or MXNet. The motivation for Keras is that, although it’s possible to create deep neural systems using TensorFlow directly (or CNTK, Theano, MXNet), because TensorFlow works at a relatively low level of abstraction, coding TensorFlow directly is quite challenging. Keras adds a relatively easy-to-use layer of abstraction over TensorFlow.

Sample page

The e-book is published by a company called Syncfusion. Syncfusion has over 150 free titles. Most of the free e-books are very good, but, like anything else, there are a couple of clunkers in the catalogue. But only a few, and hey, they’re free! I can recommend the Syncfusion company — otherwise I wouldn’t have written a book for them. The people I’ve worked with at Syncfusion — Tres, Graham, Darren, Jacqueline — and all the authors, have been great: smart, articulate, and people of integrity. No clunkers with regards to the people.

To get any of the free e-books, Syncfusion requires you to register with an email address, so that they can send you marketing messages — after all, they’re a business and ultimately need to make money. But the Syncfusion messaging is very restrained (maybe one or two a month), and in fact, often quite interesting.