| 1 | Eva Ibbotson | The Worm and the Toffee-Nosed Princess and Other Stories of Monsters | | COLLECTION | 0340687401 | 1983-01-01 | None | £3.99 |
| 2 | Bee Ifezue | The Crystal River | | NOVEL | 9781874332466 | 2010-07-16 | 2010-07-16 | £5.99 |
| 3 | C. F. Iggulden | Darien | | NOVEL | 9780718186470 | 2017-07-12 | 2018-07-12 | £7.99 |
| 4 | C. F. Iggulden | Shiang | | NOVEL | 9780718186777 | 2018-09-06 | 2019-07-11 | £7.99 |
| 5 | C. F. Iggulden | The Sword Saint | | NOVEL | 9780718186807 | 2019-08-08 | 2019-08-08 | £12.99 |
| 6 | Conn Iggulden | Tollins II: Dynamite Tales | Tollins | COLLECTION | 9780007461691 | 2011-10-27 | 2012-04-27 | £3.99 |
| 7 | Mark Illis | The Impossible | | NOVEL | 9781786540065 | 2017-07-27 | 2017-07-27 | £7.99 |
| 8 | Jessica Inclan | The Beautiful Being | The Being Trilogy | NOVEL | 9781420101164 | 2010-03-03 | 2010-03-03 | £9.99 |
| 9 | Rachel Ingalls | Mrs Caliban and Others | | COLLECTION | None on record | 1983-01-01 | 1983-01-01 | £2.95 |
| 10 | Tom Ingram | The Hungry Cloud | | NOVEL | 000184279X | 1971-01-01 | 1971-01-01 | £1.25 |
| 11 | The InkerMen | Book | | ANTHOLOGY | 9780956274953 | 2011-10-01 | 2011-10-01 | £14.95 |
| 12 | The InkerMen | Cold Turkey: A Christmas Selection | | ANTHOLOGY | 9780955625954 | 2008-12-01 | 2008-12-01 | £9.95 |
| 13 | David Ireland | The Flesheaters | | NOVEL | 0140087141 | 1972-01-01 | 1986-03-01 | £2.95 |
| 14 | Barbara Ireson | Creepy Creatures | | ANTHOLOGY | 0600320642 | 1978-09-01 | 1978-09-01 | £0.65 |
| 15 | Barbara Ireson | Fearfully Frightening | | ANTHOLOGY | 0099337703 | 1984-01-01 | 1984-01-01 | £1.25 |
| 16 | Barbara Ireson | Ghostly and Ghastly | | ANTHOLOGY | 0600340651 | 1977-01-01 | 1977-01-01 | £0.55 |
| 17 | Barbara Ireson | Haunting Tales | | ANTHOLOGY | 0140309985 | 1973-01-01 | 1986-01-01 | £1.95 |
| 18 | Virginia Ironside | Phantom of Burlap Hall | Burlap Hall | NOVEL | 074452153X | 1991-09-01 | 1991-09-01 | £8.99 |
| 19 | Virginia Ironside | Spaceboy at Burlap Hall | Burlap Hall | NOVEL | 0744512484 | 1989-11-01 | 1989-11-01 | £8.95 |
| 20 | Virginia Ironside | The Human Zoo | | NOVEL | 0744519357 | 1991-03-28 | 1991-03-28 | £6.99 |
| 21 | Virginia Ironside | The Poltergeist of Burlap Hall | Burlap Hall | NOVEL | 0744531853 | 1993-01-01 | 1994-01-01 | £2.99 |
| 22 | Virginia Ironside | Vampire Master | Burlap Hall | NOVEL | 0744508401 | 1987-08-01 | 1989-04-01 | £1.99 |
| 23 | Alex Irvine | Mare Ultima | ? | CHAPBOOK | 9781848632950 | 2012-02-01 | 2012-02-01 | £24.99 |
| 24 | Alex Irvine | Mystery Hill | ? | CHAPBOOK | 9781906301408 | 2009-03-01 | 2009-03-01 | £25.00 |
| 25 | Ian Irvine | Geomancer | Well of Echoes | NOVEL | 9781405513876 | 2001-01-01 | 2012-01-05 | £6.49 |
| 26 | Ian Irvine | The Curse on the Chosen | Song of the Tears | NOVEL | 9781405513913 | 2007-11-01 | 2012-01-05 | £7.49 |
| 27 | Clifford Irving | The Spring | | NOVEL | 0671516485 | 1996-01-01 | 1998-05-01 | £5.99 |
| 28 | Jan Irving | Lightning Strikes: Vol 1 | | COLLECTION | 9780857159991 | 2012-06-11 | 2012-06-11 | £6.99 |
| 29 | Robert Irwin | Exquisite Corpse | | NOVEL | 9781907650376 | 1995-03-01 | 2011-04-22 | £8.99 |
| 30 | Robert Irwin | Satan Wants Me | | NOVEL | 9781912868209 | 1999-01-01 | 2019-11-22 | £9.99 |
| 31 | Inbali Iserles | The Bloodstone Bird | | NOVEL | 9781406304046 | 2008-10-06 | 2008-10-06 | £5.99 |
| 32 | Justin Isis | Dadaoism | | ANTHOLOGY | 9781907681141 | 2012-05-16 | 2012-05-16 | £6.99 |
| 33 | Justin Isis | Drowning in Beauty: The Neo-Decadent Anthology. | | ANTHOLOGY | 9781943813599 | 2018-04-30 | 2018-04-30 | £12.50 |
| 34 | Justin Isis | Welcome to the Arms Race | | COLLECTION | 9781907681264 | 2015-12-16 | 2015-12-16 | £15.00 |
| 35 | Graham Ison | Division | | NOVEL | 0727851942 | 1996-01-01 | 1997-04-01 | £17.99 |
| 36 | Conrad Alan Istock | Sabasa, Fourth Planet from the Sunstar: Earth's Alter Ego | | NOVEL | 1847481515 | 2007-10-19 | 2007-10-19 | £5.99 |
| 37 | Rhian Ivory | The Boy Who Drew the Future | | NOVEL | 9781910080269 | 2015-09-17 | 2015-09-17 | £7.99 |
| 38 | Rhian Ivory | Three Strikes | | ANTHOLOGY | 9781910080863 | 2018-10-11 | 2018-10-11 | £7.99 |