The Yellow Book was a British quarterly literary periodical that was published in London from 1894 to 1897. It was published at The Bodley Head Publishing House by Elkin Mathews and John Lane, and later by John Lane alone, and edited by the American Henry Harland. The periodical was priced at 5 shillings (£0.25, equivalent to £28 in 2025) and its name contributed to the decade of its operation being referred to as the "Yellow Nineties". (This summary is from Wikipedia.)
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.