According to the list of books on pgwodehousebooks.com, P.G. Wodehouse wrote 99 books, ( I suspect the list varies in size depending on how you categorise the books).
Most of these are amongst the first ones in the list, published before 1923.
I’m yet to read them all, but I’m setting myself the task to try.
I’m not really a collector, but I’m tempted to start collecting all of the P.G Wodehouse books, even though I don’t really like the early ones about cricket and the shenanigans of youth in boarding schools.
Here is a link to the list with the available titles and where you can get them.