Education secretary Michael Gove has suggested that children as young as 11 should be reading 50 books a year – and that leading children's authors should recommend them.

Following a tour he made of America's independently-run, state-funded charter schools – including the Infinity Charter School in Harlem, which set its pupils a "50-book challenge" over the course of a year – Gove said that schools in the UK needed to "raise the bar" on children's reading:

"Recently, I asked to see what students were reading at GCSE," Gove said. "I discovered that something like 80-90% were just reading one or two novels – and overwhelmingly it was the case that it included Of Mice and Men. We should be saying that our children should be reading 50 books a year, not just one or two for GCSE."

The education secretary's remarks follow a December report that showed British teenagers slumping from 17th to 25th place in an international league table for reading standards.

But children's laureate Anthony Browne has said Gove's aims are at odds with the library closures happening under his government's watch. He declared himself "surprised" at Gove's comments, "given that the government is cutting library budgets, and that programmes giving free books to children, such as Bookstart, are also being cut."

"It's always good to hear that the importance of children's reading is recognised – but rather than setting an arbitrary number of books that children ought to read, I feel it's the quality of children's reading experiences that really matter," Browne said. "Pleasure, engagement and enjoyment of books is what counts – not simply meeting targets."

Browne's views were echoed by others'. Frank Cottrell Boyce, author of children's novels Cosmic and Millions, said that while Gove's instincts were right, the government's wider actions were "militating against what Gove wants – like closing libraries, which is just a disaster."

Alan Garner, author of children's classic The Weirdstone of Brisingamen, meanwhile, questioned the advisability of turning books into numbers. "Is any number a useful guide?" he asked. "The important aim should be a reading that is wide and deep rather than numerical. In my own primary school years I read everything I could find, which amounted to at least four books a week and as many comics as possible. The Beano and The Dandy were equal with Tarzan of the Apes, Enid Blyton, HG Wells, Kipling, wildlife books, fairy tales, encyclopaedias. This resulted, painlessly, in a large vocabulary, an awareness of differences of style, the absorption of grammar and syntax and an ability to spell."

Philip Pullman, author of the prizewinning His Dark Materials trilogy, agreed - and added a further caveat. "I'm all in favour of children reading books, of course, the more the merrier," he said. "What I'm wary of is that people will start saying that quality is more important than quantity. When it comes to reading books, children should be allowed – and encouraged – to read as much rubbish as they want to. But that can only happen when there are plenty of good books as well as rubbish all around them. Where are they going to get these 50 books a year from?"

Meanwhile, Miranda McKearney, chief executive of the Reading Agency, which runs an annual Summer Reading Challenge in which children are encouraged to read six library books over the holiday, expressed concern over the execution of Gove's ambition. "So often the discussion about how to inspire children to read focuses just on schools, but libraries, and families, have a key role to play," she said. "We won't crack the problems unless we build a more systemic approach."