In a more recent discussion of resource request questions, the majority of support was behind favoring "why" or "how" questions rather than just requesting resources.
Since you're looking for a book on data integration topics, you clearly have questions or concerns about data integration (specifically using Hadoop and ETL). If you're having architectural or design questions of a conceptual nature, you should ask those specific questions here. A good set of answers should not only address your concerns, but give links to outside resources of all types (books, blogs, articles) as well as the personal experiences of others who may have solved similar problems in the past.
Of course, once you have a solid design, Stack Overflow is a good place for realizing that design into an implementation. Depending on the nature of the question, Database Administrators Stack Exchange might also be appropriate.