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Q: "Ginny Borden Maier: Does anyone know a "rule of thumb" about what percentage of sales are lost to the used book market over the life of an edition? In other words, if the adoption rate remains basically static, how do royalty returns typically decline after the edition has been on the market for one year/two years/three years?"

A: Robert Christopherson, TAA member, author of Geosystems:

"Quick response on used-book impact. With my 3-year revision cycle we do not stay ahead of the used-book sales erosion. Fortunately in my field there is so much dynamic change that such a revision cycle is warranted.

The largest royalty checks occur April 1 (sales July 1 to Dec 31) the first year after a new book. Oct 1 (sales Jan 1 to June 30) is usually low for early spring instocks. If you have multiple titles that are on alternate years, that helps even the royalties--as one title is hit by used books, the other title is on the rise. You can have a market leading text with increasing adoptions and see sales go down in the third year because of used-book sales.

Keep track of how many printings your edition goes through by checking with editors or checking shipments at the bookstore of new books and the print number on the copyright page. Also, check Amazon and others and see what the discounts are for your book--I've found a poor competing book, losing market share has deeper discounts than a book on the rise, commanding new market share---I take this as an indicator of used-book availability---short used-book supply, less discount. A best seller, one that might be kept as a reference book, has smaller discounts.

To make a text more of a "keeper," if appropriate in your field, write with a voice, a POV, to the student, with the student, for the student. I embed over 200 URLs throughout my texts not only to help the pedagogy but to make it a reference work, one to keep.

Used books are a nightmare---a leading text with growing market share and declining sales---go figure. So glad we have TAA."

A: John Budd, University of Minnesota:

"In the budget / business plan for a new text I am proposing, my editor at McGraw-Hill assumed that approximately 60 percent of the total sales would be in year one, 30 percent in year two, and 10 percent in year three."

A: Christa Harris, Executive Editor, World Languages, McGraw-Hill Higher Education:

"I'm an editor with McGraw-Hill. Loss to used books varies greatly discipline to discipline. At McGraw-Hill, anyway, we refer to this loss by the term 'retention rate', which looks at it from the perspective of how much is retained rather than lost. (Does that make us optimists...? Or just good with euphemism?). The retention rate is usually expressed as a percentage when editors do their revenue forecasting, in case you're interested or ask your editor about retention rates.

I'm in languages, and our retention rate is above average (which means we're lucky, more students keep our books than in other disciplines, which in turn means more new book sales).

And then, each book will have its own average retention rate. As an aside, that might make an interesting study some day, to figure out the retention rates of various books in the same discipline - and various publishers, if you could ever get data from multiple publishers (I know I couldn't!). Then compare, to see if you can figure out what boosts retention rates, or affects them negatively...

And... then there are factors like pirating, book sharing by dorm-mates - sort of like a 'textbook timeshare' - and other variables that are outside of our control that will change the disciplines retention rates from year to year as well. So I can tell you what last year's retention rate was, but can't tell you yet what this year's retention rate is (until all the numbers are tallied at the end of the year).

But back to your question.

Royalty rates would decline, really, only in three ways: 1) if fewer copies are being sold in later years (or more returns are coming in), or 2) if the revenue the publisher is getting from the sales declines (even if copies sold remains the same), and 3) if an author's contract specifies a lower royalty rate under certain conditions (sales below a certain number of copies, for example).

Scenario 1 is very common... and varies as verbosely explained above. Scenario 2 can happen also - sometimes backlist books are discounted, or packages with supplements offer discounts, all to encourage sales. Scenario 3 is also very common.

By the way, I've seen several posts on the [TAA] listserv that lead me to believe authors often feel in the dark about the number of copies of their books that are being sold. Your editor can tell you, to the exact number, exactly how many copies of your book have been sold. Your editor can tell you today exactly how many copies have been sold up until yesterday evening. At the end of the year your editor can tell you exactly how many copies have been sold in the calendar year. I can look this data up in seconds on my computer and I can't imagine other publishing companies don't have the same kind of information readily available too.

It seems bizarre to me that an editor wouldn't share this information with his/her author. What's the harm in telling the author of a book exactly how many copies have sold? Then the author feels more comfortable when the mysterious, arcane and overly complex royalty statements arrive. But don't get me started with that..."

A: Ginny Borden Maier: "Thanks for the replies to my query about how I should expect sales to drop year-over-year within an edition as a result of used books. It's clear that the answer is different depending on the discipline and nature of the market.

I will share the answer I received from my editor. He estimates that, when adoption rates remain the same (so the same number of copies are being sold), a little more than 50% of the books sold after one year are used copies. In other words, I should expect royalties to drop to less than 50% in the second year of an edition. He wasn't as certain about the third year, but essentially said 'don't expect much at all, kid.'

I would say that my experience is near the worst-case scenario in terms of impact of used book sales. I write Biology textbooks for non-majors -- these students are much less likely to hang onto a book for 'reference' after the course than a major is. (Hmm. Kinda wondering about my career choice here. Should have tried to get into anatomy books for med students, maybe.)

Anyway, my query was stimulated by my learning that my September 'royalty' is a negative balance, due to all the bookstore returns in Jan-June of this year. I wasn't expecting much, but I needed to know whether my expected royalty in March of 08 was going to cover this balance and leave any payout for, say, groceries. Thanks again for your replies, and happy writing!"

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