In the battle over the pricing of electronic books, publishers appear to have won the first round. The price of many new releases and best sellers is about to go up, to as much as $14.99 from $9.99.

But there may be an insurgency waiting to pounce: e-book buyers.

Over the last year, the most voracious readers of e-books have shown a reflexive hostility to prices higher than the $9.99 set by Amazon.com and other online retailers for popular titles.

When digital editions have cost more, or have been delayed until after the release of hardcover versions, these raucous readers have organized impromptu boycotts and gone to the Web sites of Amazon and Barnes & Noble to leave one-star ratings and negative comments for those books and their authors.

“This book has been on the shelves for three weeks and is already in the remainder bins,” wrote Wayne Fogel of The Villages, Fla., when he left a one-star review of Catherine Coulter’s book “KnockOut” on Amazon. “$14.82 for the Kindle version is unbelievable. Some listings Amazon should refuse when the authors are trying to rip off Amazon’s customers.”