One of the great challenges that we face when using Drupal is, without doubt, overcome the steep learning curve. Mastering Drupal is a costly goal and it requires effort and dedication.
In Forcontu we have developed the course expert in Drupal 7, with a few educational materials organized and in Spanish, divided into 3 levels so that you can learn Drupal at your own pace.
Our books are now available in eBook (PDF), from the downloads Area. So you can test the system and see how materials are organized, we invite you to download the first 3 units of the initial level.
In addition, if you're still interested in Drupal 6, also can download complete book learning Drupal 6 - initial level.