Suggestion: Jacqueline Carey - Kushiel's Dart; John Brunner - The Squares of the City

My card: Cassandra Rose Clarke - Our Lady of the Ice

Suggestion: Larry Niven - Ringworld

My card: China Mieville - The City & the City

Suggestion: John Wiswell - Someone You Can Build a Nest In

My card: Paolo Bacigalupi, Tobias S. Buckell - The Tangled Lands

For hard mode, I could really only find sequels in series, but here are a few suggestions: Andre Norton - Warlock of the Witch World; Michael Moorcock - The Weird of the White Wolf

My card: Max Gladstone - Full Fathom Five (I've been meaning to read the Craft Sequence series anyway.)

My card: Shalini Abeysekara - This Monster of Mine

Suggestion: Anne McCaffrey - Dragonriders of Pern; Mercedes Lackey's Dragon Jousters series or any of the Heralds books from Valdemar; Rebecca Yarros - Fourth Wing

My card: using the first suggestion for this square, Naomi Novik - His Majesty's Dragon

Suggestion: any anthology, especially any edited by Ellen Datlow (books span multiple genres)

My card: Ellen Datlow, ed. - Mad Hatters and March Hares

Suggestion: Joe Haldeman - The Forever War

My card: Poul Anderson - The High Crusade

Suggestion: anything by Samuel R. Delany

My card: Samuel R. Delany - Stars in My Pocket Like Grains of Sand

Suggestion: Richard Adams - Watership Down; Richard Adams - The Plague Dogs; Kenneth Grahame - The Wind in the Willows

My card: Richard Adams - Shardik

Suggestion: George Orwell - 1984

My card: Kim Stanley Robinson - 2312

Way to crush hard mode for 4A!