- EbookSeries: ChessCathy Draig
- EbookBishopCathy Draig
- EbookKingCathy Draig
- EbookRookCathy Draig
- EbookPawnCathy Draig
- EbookQueenCathy Draig
- EbookAntipositional Play, Chess InterludeCathy Draig
- EbookKnightCathy Draig
- EbookQuiet Move, Chess InterludeCathy Draig
- EbookForcing Move, Chess InterludeCathy Draig
- EbookBack Rank, Chess InterludeCathy Draig