I'm looking for a trigonometry book that is rigorous, concise, insightful, etc. Something along the lines of Euclid's Elements, Spivak's Calculus, Rudin's Principles. I understand it's usually taught at the high school or college freshman level, but I'd like a book that someone who already knows and loves the subject might enjoy reading or teaching from. I've seen mathwonk call some calculus books "cookbooks"- I don't want a trigonometry cookbook, and that's all I've been able to find. A book covering geometry and trigonometry together would also be great- or even a precalculus book with a good trigonometry section. BTW, I already searched PF for suggestions.