Direct without going through the 1.5 For reasons of pressure (chat online marketing that I have to give the initiator of Valencia) I sat down to finish the book in a week. Not that it lacks many things: closing chapters, acknowledgments page, etc.. News: Cover design Chapter 8: 6 pages about the importance of indexing images and some screenshots of visual systems image search Chapter 9: complete explanation of the Halo effect, is also closed part of the housing domain. Version 1.6 is updated http://borradorlibroseo.bubok.com as soon hope to be able to upload the final version to the new location.