Click the list icon in the top right corner of the Swatches window and open a HKS Swatch Library:
Select all the HKS swatches, drag & drop them to the Swatches window.
Select all the HKS swatches and export them as a *.ase file. (Click the list icon again in the top right corner of the Swatches window and choose "Save Swatch Library as ASE...").
Open the PatchTool application.
Click File > Open ...
Browse to the *.ase file.
Disable the CMYK checkbox (Esko ink books use only Lab values).
Export the patches:
Use the following export settings:
Click the Do not change! button when seeing this window:
Start the Color Engine Pilot.
Select the Ink Books icon in the tool bar.
Click File > Import.
Select Files of type CxF and browse to the CxF file saved from inside the PatchTool.