The Light of Other Days is by Arthur C. Clarke and Stephen Baxter. The Tor paperback has 320 pages. The Tor hardcover also has 320 pages.
My Many Colored Days has 40 pages.
Specimen Days has 308 pages.
A Gathering of Days has 144 pages.
In the Days of the Comet has 378 pages.
Maria Light has 181 pages.
By the Light of the Moon has 496 pages.
Dying of the Light has 365 pages.
Virtual Light has 304 pages.
Lord of Light has 257 pages.
The Bridge of Light has 248 pages.
The Light in the Forest has 180 pages.
A Light in the Black has 208 pages.