{"product_id":"porch-math-grant-r-ellery-9798188861964","title":"Porch Math: A Retirement Operating System for Living Under Uncertainty","description":"Retirement is not a magic-number problem. It is an operating problem. \u003cp\u003e\u003c\/p\u003eThe 4% rule, Monte Carlo success rates, asset allocation, bond tents, Social Security, taxes, annuities, healthcare, and long-term care all answer real questions. None of them, alone, tells a household what to do when markets fall, rules change, health changes, or the person who built the spreadsheet can no longer run it. \u003cp\u003e\u003c\/p\u003ePorch Math goes inside the research behind long-term investing and retirement withdrawals, then brings it down to porch level: two friends arguing in plain English, five fictional households facing different constraints, and careful study autopsies showing what the evidence actually establishes-and where it stops. \u003cp\u003e\u003c\/p\u003eNo magic number. No fake certainty. Just research, tradeoffs, and a system designed to remain usable while the future changes.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Grant R. Ellery\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9798188861964\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Independently Published\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 07\/29\/2026\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 226\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.61lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.00h x 6.00w x 0.57d","brand":"Grant R. Ellery","offers":[{"title":"Paperback","offer_id":49002323443967,"sku":"9798188861964","price":19.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.whiterainbookhouse.com\/products\/porch-math-grant-r-ellery-9798188861964","provider":"WR Book House","version":"1.0","type":"link"}