Do you know how Rails boots up or even what it loads when it boots up? How it receives a request and returns a response? Want to learn things about Rails' inner-most workings? 

If you don't know those things and want to learn them, this will be the book for you!

This book goes through the Rails initialization process in an elaborately more detailed fashion than the Rails Initialization Guide, teaching you along the way what each part of the Rails initialization process is responsible for all the way up to a Rails application running and serving requests.

Then, in the second half of the book, we'll cover what happens when a request is received by the Rails application itself: going through the layers of Action Dispatch, Action Pack and Action View.

Prepare to have Rails demystified right before your very eyes!

For a preview, see here: http://ryanbigg.com/ddr_book/