Three libraries will undergo "extensive refurbishment" with new furniture, upgraded layouts and other facilities.
The venues in Newhaven, Rye and Hollington will be refurbished with funding from East Sussex County Council.
According to the council, the works will "enhance customer experience", creating children's areas and study spaces and adding new seating.
“I’m delighted that, with the help of capital funding, we are able to make improvements to these libraries and enhance the experience for our customers," said Councillor Claire Dowling, East Sussex County Council's lead member for transport and environment.
“Libraries offer a wide range of services and by making them as accessible and comfortable as possible, we hope to encourage even more people to use them.”
The schemes will also help reduce the libraries’ carbon footprints with a range of improvements to the buildings themselves.
Work at Rye Library began last month with a new children’s library planned, new comfortable furniture, an improved library layout and more flexibility for customers to study.
The library will be closed briefly in January next year for construction work and the project is due to finish in March.
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In Newhaven, a larger area for customers using computers will be created.
There will be new private pods to give users confidential space to hold virtual job interviews or get one to one support.
The children’s area will be redesigned and the main library will also have a new layout to help customers enjoy the space and services available.
Work is due to start in Newhaven library at the end of January.
The entrance on the high street will be improved.
In order for the work to take place, the library will be closed briefly after the half term in February.
In spring 2023, "extensive" refurbishment work will begin at Hollington Library.
As well as improvements to the children’s area and study space, shelving in the library will be improved to provide a better display of books.
Details of any closures will be advertised in libraries and online as soon as they have been confirmed.
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