Star Smashers of the Galaxy Rangers
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Star Smashers of the Galaxy Rangers (1973) is a comic science fiction novel by Harry Harrison. It is about two young men who accidentally invent a device that can transport them through space, powered by a substance called 'Cheddite', which is created by irradiating cheddar cheese.
Anyone who has read E. E. Smith's Skylark and Lensman series will quickly realise the basis of the book. While the book is humorous in its own right, only those who have read Smith's books would be aware of the original material which is being parodied.