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I'm not sure if you really need books.

I think GameMaker has tutorials on their website. You'd probably pick GML up faster by following those than by trying to just read about GML.https://gamemaker.io/en/tutorials

If you do want to read about GML again I'd recommend looking at the GML reference documentation online instead of looking for a book https://manual.yoyogames.com/#t=GameMaker_Language%2FGML_Overview%2FGML_Overview...

if you have no programming experience you might also benefit from starting out with GML's Visual tools for building games instead of jumping straight into code.

https://manual.yoyogames.com/#t=Drag_And_Drop%2FDrag_And_Drop_Index.htm