A human (contemporary, western) makes contact with an alien. Not wanting to engage 'governments and scientists' the human wants to communicate with the alien.
The alien is physiologically incapable of speech (and devoid of other obvious channels of communication perceptible by humans), plus devoid of any own resources (items/equipment) - "stranded". Also, lacking ability for any more expressive body language. Still, it's mentally advanced as much or somewhat more than humans, has a prehensile (if clumsy) limb (not suitable for sign language) and is able to write and draw.
Of course drawings (on provided paper) are the initial method of communication, but obviously they are very limited. The alien wants to learn the human's alphabet and written language.
What kind of resources (books, learning aids) or techniques commonly available today could the human provide? Assume budget is tight and basic secrecy is needed. There's good and good wits on both sides, but no specialist knowledge.