Comment by llm_trw

It's a tough one, I've never seen a book that actually covers the _bare_ minimum of the maths you need for ML.

The little learner comes close but I'd only really suggest that to people who already know the maths because the presentation is very non-standard and can get very misleading.

If you're interested drop me a line on my profile email and I'll have a look at some numerical algebra books and papers to see what's out there.