Here is my list, in no particular order.
Methods in Yeast Genetics
Some other yeast books at CSHL
Fred Sherman's primer, available free at various sites including here.
The Freiburg manual here
The timeless classics (link to volume 3 but see all volumes)
The YeastBook is an attempt to build a current encyclopaedia to replace the previous item on my list.
The Saccharomyces genome database, probably the best organism-specific resource ever.