I think this page has the same or similar content to the booklet I can't find, although my booklet was specifically about evolution.
http://www.thechristadelphian.com/is_there_a_god_online.htm
Let’s take a different line of argument. Consider for a moment the Black Mamba. This is an African snake which obtains its food by injecting a deadly, paralysing poison through hollow, curved fangs into the bloodstream of its victim. Once it has ceased to struggle, the snake engulfs the whole body into its flexible throat. Setting aside how the snake came by its highly complex toxin, we need to consider how it developed the hollow fangs down which the poison flows from a gland high in its skull into the flesh of its prey. If evolution is true, we have to assume that originally the teeth were solid, but became hollow over a long period, say millions of years. How exactly does a solid tooth become hollow? I asked an atheist recently how he explained this. ‘Oh!’ he said, ‘at some point a snake was hatched that had a small depression in one side of its tooth. In later generations this became a groove, and eventually the groove closed over to make a tube.’ This might sound plausible, until you consider the basic tenet of evolutionary theory that changes that are of no immediate service to the individual are eliminated. A hollow somewhere on the tooth would add nothing to its usefulness. Only if in the same snake there were several hollows in a line would there be a slight added efficiency. And those hollows would need to be in a line pointing downhill. A line running round the circumference of the tooth would be useless. The probability of an individual snake experiencing a whole series of such drastic mutations to the structure of its tooth simultaneously would seem vanishingly small. And then it only ends up with a groove. How did the groove close over to make a tube? Until that time most of the venom would be wasted, since it would not penetrate the flesh. Even then, the snake would still only possess one fang with a tube. But it has two fangs, each of which needs to be hollow.
What we are saying is that when you get down to the detail of what is needed for evolution to work, it becomes much simpler to assume that a God out there designed a working snake complete with poison and fangs, which He then set down as a predator in the great pyramid of life. We could multiply this example with a thousand others: the tear drain in the human eye — a minute tube that runs through the thickness of the eyelid; the migration of the New Zealand cuckoo across open ocean to the tiny islands of Vanuatu; the clotting of blood — essential for us to survive the smallest cut and yet remaining liquid while passing through the capillaries of our arteries — the whole of nature has mechanisms and structures that cry out ‘design’! Such brilliant inventions do not, in our experience, arise out of random events such as chance mutations in our reproductive cells.