Learn to Tat (Finnish: Käpypitsi) is Janette Baker's excellent book to the secrets of tatting. It is complete guide for everyone who wants to learn this way of making beautiful lace. It includes all you need to know to get started. Instructions and pictures are good. It is originally published on 2008 so you might get it at second hand if someone has decided to give away her copy.
The book consists of 9 lessons and 9 designs to learn and use your new skill. It includes basic information and history too. Definitely a must buy if you ever face it.
I bought this book already on 2011 when I also blogged about it without a picture. Unfortunately the website of the issue doesn't exist anymore but there is DVD included in some English versions of the book.