Complex sentence: IUCN has one of the world's most comprehensive ranges of authoritative publications, reports, guidelines and databases for conservation and sustainable development, publishes or co-authors more than 150 books and major assessments every year, along with hundreds of other reports, documents and guidelines.
Split into simpler sentences: IUCN has one of the world's most comprehensive ranges of authoritative publications, reports, guidelines and databases for conservation and sustainable development. They publish or co-author more than 150 books and major assessments every year, along with hundreds of other reports, documents and guidelines.