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“Said I’d do two clues before bed. Next thing I knew it was 1am and I was down to my last few HUNDRED names.”

Joanne P, USA
 4.9 from 7000+ reviews

Lily Let The Killer In

Lily Let The Killer In

$24.95
$24.95 $45.00
SAVE 44% Sold out

UPDATE: Selling out FAST - thousands ordered this week alone. Last copies left in stock.

check Track a killer through 10,013 hotel stays

check Find the guest Lily should never have let in

check Every clue checkable against the register

check Earn the answer, one clue at a time

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The Weekly Case Files

The Weekly Case Files

Receive 5 brand-new murder-mystery logic puzzles every week, packed with suspicious characters, hidden clues, clever twists, and cases waiting to be cracked. First week free, then $9.99/week. Cancel anytime.

Lily Let The Killer In

Lily Let The Killer In

$24.95
$24.95 $45.00
SAVE 44% Sold out

Everything Lily took with her the night she ran. The hotel’s complete guest register - 10,013 stays across 197 pages, every name, room and night from 1993 to 1995. Her letter to you, the local paper’s report on Helen’s death, and 20 clues that tell you exactly what’s true of the killer’s line. All you add is a pencil. Once you’re down to one name, the coded answer at the back confirms it without giving anything away.

Your book will be packed, sent out, and in your hands within 5-12 business days.

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Solve the murder the police are pinning on the wrong woman

England, 1995. Hours after the Greyfriars Hotel’s grand ball, its owner is found dead - and the only suspect is Lily, the receptionist who let in a guest nobody else saw. She fled with the hotel register and sent it to the one person she trusts: you. 10,013 stays. 20 clues. One killer. Cross out every name that doesn’t fit until only the killer is left - and Lily walks free.

phishing a case that keeps you hooked for weeks

Beat the mystery using only the evidence in front of you

Ever hit the big reveal in a mystery and feel cheated?

The deciding clue was never shown, the detective knew something you didn’t, and you never really stood a chance.

It’s not you - it’s books that keep the evidence from you. Here, all 20 clues check against the register in your hands. No trivia, no hidden twist, one answer - and when you find it, you’ve earned it.

check solve the clues in any order you like

Feel the case close in with every name you cross off

10,013 suspects feels like a lot - until your first clue clears whole pages of names at once. Then the next clue does it again.

Every line you strike through makes the list smaller and the pull to keep going stronger. No timer, no screen, just you and a pencil. Your crossed-out lines save your place, so you can stop for the night and pick up right where you left off.

featured_seasonal_and_gifts the perfect gift for any mystery lover

Everything Lily left in your hands...

Lily sent you everything the police never got their hands on. Here’s what’s waiting inside:

check The local paper’s report on the night the hotel’s owner died

check Lily’s handwritten letter - and the reason she trusts you

check The complete hotel register, all 197 pages of it

check Three full seasons of guests, logged month by month

check 20 clues on the killer’s name, room, and nights

check Guests who checked in more than once (every stay is its own suspect)

check Clues about the guests listed right before & after the killer

check The police form you’ll fill in with the killer’s name

What readers said after naming the killer:

96%

said it’s the most satisfying mystery they’ve ever solved themselves

93%

said they couldn’t stop at just one clue

89%

said it replaced their evening screen time with something they actually look forward to

*based on our 2025 customer survey

Over 7000+ cases closed, and counting.

  • Bought one for me and one for my sister.

    We’re doing it at the same time and texting each other every time we cross off a big chunk. She’s two clues ahead of me right now and I am NOT okay about it. Best thing we’ve done together in ages.

    Alyssa C, USA

  • Properly hooked.

    My copy’s covered in tabs now and looks like it’s been through the wars. Took me nearly a fortnight of evenings, but every clue felt FAIR, nothing sneaky. Brilliant feeling when it finally came down to one name.

    Julie L, UK

  • The clues are so easy to follow.

    I was worried 20 clues would be confusing, but every one is written so plainly you just check it against the register and keep going. I keep my notes on index cards and do a few each night. My favourite part is how SATISFYING it is crossing lines out.

    Nadine F, Canada

  • Finished it and ordered Volume 2 the same night!

    I figured 10,013 names would take forever, but the clues cut through it way faster than I expected. The second I wrote down the killer’s name, I went straight back and ordered The Last Alibi. I NEED more of these.

    Russ T, USA

  • My new favorite way to spend a night in!

    Grabbed a blanket and some hot cocoa and told myself I’d just read the setup. Three hours later I’d crossed out half a season of guests and couldn’t put it DOWN. Haven’t opened Netflix all week.

    Colleen M, USA 

  • Went full detective with the highlighters.

    Colour-coded the whole register and had it down to four surnames on a sticky note by Sunday. Reckon I checked the last clue three times just to be sure. When it CLICKED, I actually yelled.

    Leanne B, Australia

    Frequently Asked Questions

    A murder mystery puzzle book you solve yourself - one hotel register, 10,013 stays, 20 clues, and only one name that fits them all.

    No. Each clue clears huge chunks of the register at once - so the list shrinks fast and the final few names feel earned.

    Yes. Every clue checks against the register in your hands - no trivia, no hidden twists, and only one line fits all 20.

    No. If you can read a name and compare two numbers, you can solve it - all it takes is a pencil and a little patience.

    Most readers spread it over a week or two of evenings - but there’s no timer, so it runs at whatever pace you like.

    The solution is printed in code at the back - so you can confirm your killer without accidentally spoiling the case.

    Yes. Your crossed-out lines save your progress - put it down for the night and pick up right where you left off.

    Yes. The Last Alibi is a brand-new case with a new way to play - so once you’ve named Lily’s killer, the next mystery is ready.

    Need help?

    We got you! Our support team is available 7 days a week to assist you with every possible worry - just message info@enfala.com or call +1 (302) 265-3550 & we will be more than pleased to help you.

    Free & easy returns

    No stress, no hassle. If you need to return your order, we make it simple. Our team is here 7 days a week to help you every step of the way.