Whether you’re building products with habbits in mind or not, this book is a great insight into the human mind and a testament to how products like Facebook have such high engagement.
Here you'll learn about BJ Fogg's behaviourial model and Nir's hooked model of course. Go online and you'll learn about such things as the double hooked model at Experia.
Back to the book, there's great stuff about the key to variable rewards and the different types of rewards like rewards of the tribe, completion etc. But really the itch is what our brain craves and Nir was the first to assimilate that to me via this book, his talks and workshop.
Coming soon is the anti-hooked book from Nir which I look forward to picking up.