Reading challenge - suggestions needed!

Pulitzer Prize winner - The Goldfinch

Written by someone under 30 - A Constellation of Vital Phenomena

A book that became a film - The Hours

Book that became a film: The Maltese Falcon.

Oh yes purple, the mobile library parked in the courtyard, that's a fab book.
I like all your selection, especially Angel and 84 Charing Cross Road. Years ago there was a lovely film of 84 CCR, IIRC I wept buckets at the end.

Ada's suggestion of the Queen & I for a funny book made me remember the Alan Bennett book about the Queen discovering her local library - I think it's called The Uncommon Reader? Funny & very short.

Forgot a Pulitzer Prize winner - A Visit from the Goon Squad by Jennifer Egan

A book that became a film - Notes on a Scandal by Zoe Heller
A book with a number in the title - 84 Charing Cross Road by Helene Hanff
A book written by someone under 30 - Frankenstein by Mary Shelley
A funny book - Love in a Cold Climate, The Pursuit of Love both by Nancy Mitford
A book with a one word title - Angel by Elizabeth Taylor
A trilogy - His Dark Materials by Philip Pullman

Pulitzer Prize winner: The Amazing Adventures of Kavalier & Clay By Michael Chabon (or The Shipping News, mentioned above)

Trilogy: The L-Shaped Room and sequels by Lynne Reid Banks

Romance ~ Mansfield Park

Book that's a film ~ The light between oceans, M L Stedman
(or The Hunger Games)

Number in title ~ A thousand acres, Jane Smiley

Non human characters ~ Wind in the Willows

A funny book ~ A confederacy of dunces , John Kennedy Toole
or a bit lighter, The Queen and I, Sue Townsend

One word title ~ Wool, Hugh Howey

Short stories ~ The assasination of Margaret Thatcher, Hilary Mantel

Pulitzer winner ~ All the light we cannot see, Anthony Doerr
or The Shipping News, Annie Prouix
or The Colour Purple, Alice Walker

Trilogy ~ The Lord of the Rings

A classic romance - Pride and Prejudice by Jane Austen

A book that became a film - Lord of the Rings by JRR Tolkien. It's also a trilogy.

A book with a number in the title - A Tale of Two Cities by Charles Dickens

A book written by someone under 30 - Carrie by Stephen King

A book with non-human characters - Watership Down by Richard Adams

A book with a one word title - Idlewild by Nick Sagan

A book of short stories - one of Roald Dahl or Stephen King's collections

A Pulitzer Prize winner - To Kill A Mockingbird by Harper Lee

A book with a one word title - ONE

A book that became a film -The Book Thief
A book with a number in the title - ONE
A book with non-human characters -The Humans by Matt haigh 😛
A funny book - A man called Ove
A book with a one word title
A book of short stories- Rachel Joyce has a lovely book of short stories but I've forgotten what it's called! Something to do with Snow
A triology- Child 44 is amazing and the following two

A classic romance - Jane Eyre
A book that became a film - Rebecca
A book with a number in the title - 1984, catch 24
A book with non-human characters (I've already read Animal Farm before) - The Island of Dr Moreau
A book with a one word title - atonement
A book of short stories - Kate Mosse
A Pulitzer Prize winner - To kill a mockingbird. Harper Lee
A trilogy - All Souls Trilogy by Deborah Harkness, Languedoc Trilogy by Kate mosse

Here's a few ideas:

A book that became a film - Notes on a Scandal
A book with a number in the title - Starter for Ten
A book written by someone under 30 - The Secret History
A funny book - I, Partridge
A Pulitzer Prize winner - The Goldfinch

I agree with Peter May's Lewis trilogy, or The Girl with the Dragon Tattoo and the rest of the original Millennium trilogy.
Book made into a film - The Great Gatsby/Little Women/Suite Francaise
Sounds like a fab challenge, happy reading!

I was hard-pressed to think of many true trilogies that were any good tbh

Bookend LOTR with The Hobbit and Silmarillon if you want to fulfil the category with a clear conscience, OP

Btw, love your challenge. I try and mix it up for reading but realistically I fall back on the same authors/genres.
Making notes from some of the suggestions.

The Underground Railroad by Colson Whitehead is this year's Pulitzer prize winner, it's on my to-read list and I've heard very good things about it.

Octavia E. Butler wrote some great short stories

For a number in the title, I thought 'A Thousand Splendid Suns' (Khaled Hosseini) was fantastic.

The Lord of the Rings is really one novel in 3 volumes, but I'd still stick it under the trilogy section because it's too good not to read. The Two Towers has a number in the title, so you could get it in that way too

A few of those suggestions cross over into other categories - I think Gone WW and the Carver both won Pulitzers, etc lots of movies made, so can mix and match, hope you find something you like!

A classic romance: Pride and Prejudice/Peruasion/Sense and Sensibility if you haven't read any of them.

Book that became a film: Captain Corelli's Mandolin by Louis De Bernieres, Gone With the Wind by Margaret Mitchell, To Kill a Mockingbird by Harper Lee.

Book with number: Fahrenheit 451 by Ray Bradbury

Under 30: The Luminaries by Eleanor Catton

Non humans: Watership Down or Black Beauty

Funny book: Lucky Jim by Kingsley Amis

One word title: Lolita by Nabokov

Short stories: Where I'm Calling From, Raymond Carver or To Room Nineteen, Doris Lessing

Pulitzer Prize winner: Middlesex by Jeffrey Eugenides

A Trilogy: His Dark Materials by Phillip Pullman or Lord of the Rings by Tolkien

A classic romance
Barchester Towers

A book that became a film
The Martian

A book with a number in the title
Slaughterhouse five or 1066 and All That

A book written by someone under 30
Bright Lights Big City by Jay McInerney

A book with non-human characters (I've already read Animal Farm before)
The Wind in the Willows

A funny book
Mapp and Lucia or Three Men and a Boat or any Wooster and Jeeves or 1066 And All That

A book with a one word title

A book of short stories

A Pulitzer Prize winner

A trilogy
Jane Smiley's Some Luck Trilogy. I recommend Some Luck on its own if you only want to read one.

The Name of the Rose or LA confidential for book to film. WARNING: both way more complex than the films.
The Martian is also a good book to film or in sci-fi category if you want something lighter and uplifting.