Private Equity interview preparation

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100

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83

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September 2026

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All firmsAdvent International6Apollo Global Management6Audax Group6Carlyle Group6EQT6Silver Lake6Vista Equity Partners6WPWarburg Pincus6HIH.I.G. Capital5Oaktree Capital Management5Platinum Equity5TPTPG5General Atlantic4AMAres Management3Blackstone3Clayton Dubilier and Rice3GSGuggenheim Securities3Insight Partners3Invesco3Lazard3Neuberger Berman3NUNuveen3TSTruist Securities3Bain Capital2HWHarris Williams2Kohlberg Kravis Roberts2Millennium Management2Moody's2Rothschild & Co2WBWilliam Blair2Bessemer Venture Partners1Citi1Evercore1FTFranklin Templeton1Houlihan Lokey1HPS Investment Partners1KKR1Mizuho1MSMorgan Stanley1Sycamore Partners1

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All topicsLBO mechanics7Value creation5Returns2Fund economics9Investment judgement18Valuation6Firm knowledge2Credit and financing9Operations4Due diligence8Career and fit11Sector knowledge4Accounting2Deal structuring7Industry knowledge3Brainteasers3

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1. 093How many books were sold in the US last year?BrainteasersIntermediatetechnicalAdvent InternationalPrivate Equity · Boston · 2022

   Say this

   Around 700 million to 1 billion units. Take 330 million people, assume about half buy any books, and an average of four to six a year among buyers.

   Then walk it

   1. Population 330 million, less young children, so about 280 million potential buyers.
   2. Participation: perhaps half buy at least one book in a year, so 140 million buyers. Flag this as the least certain assumption.
   3. Intensity: the distribution is heavily skewed, with most buyers taking two or three and a small group of heavy readers taking twenty or more. An average of five across buyers is reasonable.
   4. 140 million times 5 gives 700 million units.
   5. Then the segments not in that figure: institutional and textbook purchases driven by schools rather than individuals, which might add 50 to 100 million.
   6. So 750 million to 1 billion. Published US print unit figures sit around 750 million, so the estimate holds, and I would name participation rate and books per reader as the two assumptions the answer is most sensitive to.

   Where candidates lose it

   Using a flat population-wide average and ignoring the skew. Also failing to say which assumption drives the answer, which is the part that makes it a market-sizing answer rather than a guess.

   Expect next

   • Now size it in dollars.
   • Which assumption would you check first?
   • How would you size a market bottom-up for a diligence?

   Reported by candidates at Advent International (Private Equity, Boston, 2022). Source: Wall Street Oasis.

Firm tags come from public, anonymous candidate reports on Wall Street Oasis: strong signal, not sworn testimony. Firms are named as the places a question was reported, not as partners of Fin Maverick. Answers are written for this page to show how to think out loud; they are not scripts to recite.