MISQUAH — Brynn Solberg has cleared the wolves. The Misquah Public Library’s summer reading program, now three weeks old, has watched its most determined participant exhaust a second entire reading tier, leaving children’s librarian Ruth Aune to contemplate, not for the first time, a level the library does not currently offer and has never before needed.

Miss Solberg, who finished fourth grade this spring, blew through the “bear” level before the program officially began and was advanced to “wolves,” which she has now also completed, reading, by the library’s count, well past a book a day and treating each tier less as a milestone than as an obstacle placed deliberately in her path. The next rung up, “eagles,” does not exist; Aune invented the animal ladder in 2003 and, she admits, “never once thought anybody would get this far this fast, or this stubbornly.”

The program itself is having a record June: twenty-nine children enrolled, up from twenty-two last summer, enough that the bear tier — the entry level, sized for ordinary mortals — has developed an actual waiting list for its laminated badges. Aune keeps the tally on an index card beside a small framed photograph of Marian Olson, the first-grade teacher who taught half the current parents to read and who died in May at ninety-six. “Marian sent me these kids,” Aune said. “Every one of them. I just hand out the animals.”

“I’m looking at adding eagles,” Aune said, from a desk where she has begun sketching tiers on scratch paper between patrons. “Or possibly moose. I haven’t decided what a moose would read, but I have until roughly Friday to figure it out, because that’s when she’ll be done with whatever I give her next.” She reiterated her standing request that the rest of the town “pace itself,” noting that the summer is long, the shelves are finite, and “there is still, somehow, a waiting list for the bears, which the program was designed around.”

Miss Solberg, reached in the nonfiction section with a stack at her elbow, said she was “taking a short break” — she estimated its length at “maybe a day” — and then planned to “start the grown-up part,” by which she meant the adult collection, a prospect Aune called “premature, and hard to argue with, which is the story of working with that child in a single sentence.”