The book and toy store mini-chain Henry Bear’s Park, with locations in Cambridge, Arlington, and Brookline Village, Mass., is the latest Boston-area book institution to go on the market. Its Cambridge store is just a few doors down from Porter Square Books, which has been up for sale for several months. Both stores are represented by Paul Siegenthaler of Ridge Hill Partners.

“It’s the right time,” says Sally Lesser, who founded Henry Bear’s Park more than 35 years ago. “Business is very good, and there are many exciting possibilities for growth. Those opportunities are best tackled by someone with a long future ahead of them. I’m hoping to work with new owners through the business transition, as I move towards my retirement.” She is prepared to take time to find the right buyer or buyers. “It is important to me to make a good transition for our customers, our staff, and our communities,” she says.

Henry Bear’s Park takes its name from David McPhail’s picture book of the same name.