More to explore:
Rethinking collection development and management / Becky Albitz, Christine Avery, and Diane Zabel, editors. Santa Barbara, California : Libraries Unlimited,  This book provides an up-to-date professional guide that complements traditional collection management texts; identifies current trends and paradigm shifts in collection development and management, and illustrates best practices for emerging trends in collection development.
Bartlett, Wendy K. Floating Collections: A Collection Development Model for Long-Term Success. Santa Barbara, CA: Libraries Unlimited, 2014.
The Adventures of Library Girl: Collection Development 2.0
Weed 'Em and Weep: Hoarding is Not Collection Development #CollectionDevelopment