Boulder. This 2019 four-bedroom home has an open-plan great room with a floor-to-ceiling bookshelf and rolling library ladder. The house blends Scandinavian and Japanese design and features polished wood floors, artisanal tiles, and oversize windows with views of the Flatirons.

The 5-acre Wildflower Ranch property includes landscaped grounds, a barn, a pasture, a seasonal pond, water rights, and a three-car garage. $6,900,000. Carliss Erickson, LIV Sotheby's International Realty, (303) 249-8384.

New York City. Nobel Prize–winning author and previous owner Toni Morrison converted the third bedroom of this 1901 Tribeca loft into her library and writing room. The two-bedroom home features a living-dining area with gas fireplace; an open-plan kitchen; a master suite with dressing area, walk-in closet, soaking tub, and glass rain shower; and sweeping city views.

Building amenities include a residents' library/media room, fitness center, garden courtyard, and rooftop terrace. $4,250,000. Amanda S. Brainerd, Brown Harris Stevens, (917) 494-8858.

Montecito, California. The second bedroom of this two-bedroom Tudor features a wall-to-wall alderwood bookcase. The house also has a built-in bookcase on the stairs; a main suite with fireplace, soaking tub, and deck; and a chef's kitchen with alderwood cabinets and tiled counters.

The cul-de-sac lot has a patio, lawn, and gardens and is part of a gated community with a pool, tennis courts, and beach access. $4,200,000. Jason Siemens, Sotheby's International Realty, (805) 455-1165.

Litchfield, Connecticut. Built in 1856 as a boys' boarding school, this Colonial-style home has a large library with 9-foot ceilings, floor-to-ceiling bookcases, and four oversize windows. The six-bedroom house retains original carved-wood details, crown moldings, and five fireplaces, and includes a chef's kitchen, butler's pantry, and formal living and dining rooms.

The 2.6-acre property in historic Litchfield features mature trees and a backyard lawn, pergola, terrace, and heated lap pool. $1,350,000. Jane Hinkel, William Pitt/Sotheby's International Realty, (860) 459-0718.

Santa Fe. The library of this five-bedroom contemporary home features wall-to-wall bookshelves, a skylight, and recessed lighting. The house includes a gourmet kitchen, a great room with stacked-sandstone fireplace, a main suite with walk-in closet and walk-in shower, and an attached guesthouse.

The half-acre landscaped property on the edge of historic Santa Fe has lawns, a multilevel patio, a koi pond with waterfall, a hot tub, and views of the Sangre de Cristo and Pecos Mountains. $2,150,000. Darlene Streit, Sotheby's International Realty, (505) 920-8001.

Oxford, Mississippi. This 1991 Greek Revival stands in the center of a town famed for its connections with William Faulkner and John Grisham. The four-bedroom house has a wall-to-wall bookshelf in the game room and also features a living room with fireplace and an eat-in kitchen with hardwood floors and cabinetry and decorative tilework.

The 1.1-acre lot is landscaped with trees, lawns, and a wraparound terrace. $399,900. Harry Alexander, Cannon Cleary McGraw, (662) 801-5621.

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