What were some books that were popular in 1900-1907?

the Sherlock Holmes stories by Arthur Conan Doyle were immensely popular at this time. a Study in Scarlet, the Casebook of Sherlock Holmes, The Hound of the Baskervilles etc, would be likely to be in your library.

mark Twain was a very famous writer at this time, most of his most popular books were published before 1900 - Tom Sawyer, Huckleberry Finn, Roughing It, Life on the Mississippi , the Prince and the Pauper, A Conneticut Yankee at King Arthur's Court etc. these books would very likely be in a library of the early 1900s.

The Call of the Wild by Jack London was published in 1903, a big success. White Fang followed in 1906.

Rudyard Kipling was another very popular early 20th century author. the Jungle Book appeared in 1894, Kim in 1901, The Just So Stories in 1902

henry James was an admired author of this period, books like The Portrait of a Lady, The Bostonians, What Maisie Knew, The Spoils of Poynton, would probably be in the library. the Wings of the Dove was published in 1902, The Ambassadors in 1903, and The Golden Bowl in 1904.

Jules Verne was another writer greatly admired in this era, He is considered the first science fiction writer, and his books were very popular. Around the World in 80 Days, 20,000 Leagues Under the Sea, Journey to the Centre of the Earth, from the Earth to the Moon etc, would be in an early 1900s library.

H.G. wells, another early science fiction writer, would probably be in your library, The Time Machine was published in 1895, Invisible Man was published in 1897, The War of the Worlds in 1898, The First Men on the Moon in 1901, Love and Mr Lewisham in 1900, Kipps in 1905.

The Red Badge of Courage, by Stephen Crane, was published in 1895, and was a great success, It would certainly be in your library.

The Scarlet Pimpernell by Baroness Orczy, was published in 1905 and was a huge success, it would certainly be in your library.

edith Wharton was becoming famous at this time, her novel The House of Mirth was published in 1905.

Elinor Glyn's rather torrid romances were very popular at this time, her most famous novel, Three Weeks, was published in 1907, considered very risque at the time.

Lord Jim by Joseph Conrad was published in 1900, and would probably be in your library. The Heart of Darkness was published in 1902.

if children's books are included in your library, the Oz books by L. frank Baum were published in the early 1900s, beginning with The Wonderful Wizard of Oz in 1900.

there would of course be likely to be older books in your library as well - the novels of Dickens for instance were still very popular in the early 1900s, and you might also have works by Thackeray, Trollope, Jane Austen, George Eliot, Emily Dickinson etc.

Well, that's only three years after 1904 when two very exciting books came out, which people would certainly still have been comparing and discussing during your time frame:

1) "Eldred" was published in 1904 by William James Rivers, a famous former Confederate writer who was also a famous university lecturer, and it was a novel in verse, which means it rhymed (sort of)... all about a man called Eldred who had just witnessed the defeat of the South in the Civil War so he took a ship called the 'Bethlem' down upon underground rivers and sailed on aquafers, which are subterranean seas, and met the "Secret Chiefs"--a popular idea at the turn of the century among the many popular esoteric groups such as Theosophists--in giant underground caverns. This being from a former Confederate was widely read in the South, but also had a following internationally.

2) "The Book of the Law" was published by Aleister Crowley the same year. It was supposedly "channeled" by his wife Rose Kelly in the Great Pyramid at Gizeh and was supposed to be called "Liber L" according to the spirit that channeled the information and the "L" would have been prounounced "La" but Crowley changed it to Liber AL shortly before publication... still, it was on the shelves as "The Book of the Law"... which had something to do with the male as opposed to the female energies.

These two books were widely read and discussed amongst millions of people who, in that era, held seances as popular parlour entertainment... and there was a magazine called "The Equinox" and, another writer named James Branch Cabell in Richmond, Virginia was writing semi- esoteric stuff as well, and sometime in that era wrote "Jurgen" which was nearly banned in the United States;in fact, there was a Federal Court case to clear it for publication because some people misinterpretted its exsoteric symbolism as sexual.

That time period saw a widespread interest in Tarot cards, mythology, and Spiritualism... among persons of every class.

Any library would have 'standard' and reference works rather than just what was newly published. By then Mr Dicken's novels would have come out in volumes that would be suitable for a library. So you could pretty well fill it with all your 18th century and 19th century classics.