arkham trilogy

The Wondla Trilogy (Boxed Set) - (Search for Wondla) by Tony Diterlizzi

City on Fire - by Don Winslow

The Way of the Wilderking - (Wilderking Trilogy) by Jonathan Rogers (Hardcover)

Amid Stars and Darkness - (Xenith Trilogy) by Chani Lynn Feener (Paperback)

The Elemental Trilogy - (Horror Historia) by William Hope Hodgson (Hardcover)

The Girls from See Saw Lane - (Brighton Girls Trilogy) by Sandy Taylor (Paperback)

Muir's Gambit - (The Aiken Trilogy) by Michael Frost Beckner (Hardcover)

Where Love Dwells - (Candlewood Trilogy) by Delia Parr (Paperback)

Unforgiven - (Horsemen Trilogy) by Mary Balogh (Paperback)

Back to Green - (Going Green Trilogy) by Heather S Ransom (Paperback)

Journeys Out of the Body - (Journeys Trilogy) by Robert A Monroe (Paperback)

The Dr. Fu Manchu (a Supervillain Trilogy) - by Sax Rohmer (Paperback)

The Murders of Molly Southbourne - (Molly Southbourne Trilogy) by Tade Thompson (Paperback)

The Girl in the Tower - (Winternight Trilogy) by Katherine Arden

A Skye Full of Stars - (Skye Sisters Trilogy) by Sue Moorcroft (Paperback)

The Bones of Ruin - (Bones of Ruin Trilogy) by Sarah Raughley (Paperback)

Finders Keepers - (Bill Hodges Trilogy) by Stephen King (Paperback)

Sing - (Homeward Trilogy) by Lisa T Bergren (Paperback)

Moon Witch, Spider King - (Dark Star Trilogy) by Marlon James (Paperback)

King's Man - (Viking Trilogy) by Tim Severin (Paperback)

Dune: The Duke of Caladan - (Caladan Trilogy) by Brian Herbert & Kevin J Anderson (Paperback)

Red Sparrow - (Red Sparrow Trilogy) by Jason Matthews (Paperback)

The Forest of Hands and Teeth - (Forest of Hands and Teeth Trilogy) by Carrie Ryan (Paperback)

World of Wonders - (Deptford Trilogy) by Robertson Davies (Paperback)