Easiest thing is buy a logbook from the flying school, they'll invariably keep a few of a type they're happy with in stock.
There's nothing mysterious about a logbook, it just records all your flying - when, where, what times, who was on board, and if it was a lesson the lesson number and signed off by your instructor. Basically the pages are just a series of tables with standard headings - it's very obvious when you see one.
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