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One of mine is the LEGO Build it Book Amazing Vehicles which is essentially the book form of Rebrickable for set 5867 Super Speedster by Nathaniel Kuipers before Rebrickable was a thing. Instructions for 10 vehicles made with this one set. Having built some of his alternate builds from many, many years ago I felt that this was a good way to support him. Only problem is this set was no longer in production. Fortunately, it's a creator set and the pieces were fairly common and I assembled the pieces myself.
https://www.amazon.ca/LEGO-Build-Book-V ... 00F3FBNHQ/
He's such a prolific alternate build creator that he made a second book, with 10 more vehicles.
https://www.amazon.ca/LEGO-Build-Book-V ... 593275137/
Set: 5867


Granted now these instructions can all be found on Rebrickable, and you can find even better looking ones but it's still neat to see the versatility of a single set.