Chapter 1: GrpE, Hsp110/Grp170, HspBP1/Sil1 and BAG domain proteins: Nucleotide exchange factors for Hsp70 molecular chaperones -- Chapter 2: Functions of the Hsp90-Binding FKBP Immunophilins -- Chapter 3: Hsp70/Hsp90 organising protein (Hop): coordinating much more than chaperones -- Chapter 4: Specification of Hsp70 function by Hsp40 Co-Chaperones -- Chapter 5: Cdc37 as a Co-chaperone to Hsp90 -- Chapter 6: p23 and Aha1 - Distinct functions promote client maturation -- Chapter 7: Beyond chaperoning: UCS proteins emerge as regulators of myosin-mediated cellular processes -- Chapter 8: Chaperonin - Co-Chaperonin Interactions -- Chapter 9: Co-chaperones of the human endoplasmic reticulum: an update -- Chapter 10: J Domain Proteins Orchestrate the Multifunctionality of Hsp70s in Mitochondria: Insights from Mechanistic and Evolutionary Analyses -- Chapter 11: Impact of co-chaperones and post-translational modifications towards Hsp90 drug sensitivity -- Chapter 12: CHIP: a co-chaperone for degradation by the proteasome and lysosome -- Chapter 13: HSP70-HSP90 chaperone networking in protein misfolding disease.