Caesar

Were Zoo #23

by R.E. Butler

Alpha lion Caesar has everything…except a mate by his side. Then jaguar shifter Sera arrives with danger on her heels, and his animal snaps to attention with a single demand—mine.

After sacrificing everything to help her daughter escape a forced mating, Sera is only looking for safety at the safari park. But Caesar is impossible to ignore—powerful, protective, and so tempting it hurts.

When the jaguar alpha shows up with plans to use Sera to retain control of his people, Caesar will show him why alpha lions are the most dangerous males on the planet when their soulmates are threatened.

All hail the king.

156 pages, Kindle Edition

Published February 6, 2026

Reviews

[Alicia Wood · Rating 4 out of 5]

Yay for a good story and happy ending!!

Otto is deranged enough to not give up and causes quite a few issues for everyone at the park.

Despite all the troubles, Caesar and Sera do their best to continue to live life, long awaited dreams start becoming reality, and our favorite moose makes a great appearance in this book!

Can’t wait for the next one in this series!!!

[BookishEchoes · Rating 5 out of 5]

⭐️⭐️⭐️⭐️⭐️
ꪑꪗ ᥅ꫀꪜﺃꫀ᭙
𝑅. 𝐸. 𝐵𝓊𝓉𝓁𝑒𝓇
𝒞𝒶𝑒𝓈𝒶𝓇 (𝒲𝑒𝓇𝑒 𝒵𝑜𝑜 𝐵𝑜𝑜𝓀 𝟤𝟥)
📖 156 𝔭𝔞𝔤𝔢𝔰
🗓️ 𝓡𝓮𝓵𝓮𝓪𝓼𝓮𝟘𝟚/𝟘𝟞/𝟚𝟞
✍️ 𝑅. 𝐸. 𝐵𝓊𝓉𝓁𝑒𝓇
✨ MCs: ᴄᴀᴇꜱᴀʀ, ꜱᴇʀᴀ
This series just keeps getting better! Book 23 takes everything I love about the Were Zoo series and elevates it even further. From the powerful alpha lion Caesar to jaguar shifter Sera, the chemistry, suspense, and adventure kept me completely hooked.

I loved how the story balanced danger, romance, and the intensity of the mating bond. The stakes were high, the emotions were real, and the characters’ journey was deeply engaging. RE Butler knows how to connect her readers to the characters’ struggles and triumphs, making every moment feel earned.

This story didn’t just meet my expectations! it exceeded them. I’m already excited to see what she writes next. Chef’s kiss!

[Yvonne Daniels · Rating 5 out of 5]

Roaring Goodness

I totally enjoy this series it's one of my favourite, I couldn’t resist the Zoo Shifter Romance series. It's Caesar and Sera story, this safari zoo is ran by shifters and Caesar is a Lion and is Alpha of the lion pride he lives with his two son and a group of Bears, Wolves, Elephants and Gorillas they are totally loyal, caring group of friends that are tough as nails when they need to be. Sera is a Jaguar who is seeking sanctuary in the park with these shifters. When Caesar and Sera met the sparks flew! This is a spicy and romantic GREAT story that's such a pleasurable experience.I enjoyed catching up with old characters and meeting new ones. Another excellent story by R.E Butler I really love this it's awesome,I could not put my reader down till the end!! I highly recommend this book to any adult that love reading paranormal romance!!

[Terry Sasada · Rating 5 out of 5]

Awesome

I have always loved Caesar, and I am so glad it was his turn. And he found the perfect mate in Sera. Now all he has to do is protect her from another alpha that is insisting she belongs to him. But I love most about all the books is all the different groups that come together to defend each other. They are happy just to find their mates, they don’t care if they’re human, not human or any other shifter. And the fact that all these different groups of shifters live together, and support each other as a family. But it was super awesome to see someone in their 40s finally get their happily ever after. This is such a wonderful series. If you have not started it you are definitely missing out.

[Bente Correll · Rating 5 out of 5]

First of all - this book can be read as a standalone, but would recommend you read Seneca (where zoo) and Avi (little river stallions) prior to this, since these are the stories of Sera’s daughter and adopted daughter.
It was so good to finally have their story wrapped up with all the trouble the women’s old jaguar pack have caused.
This book contains a lot of sweet moments and I love the dynamics between Caesar and Sera, but there is plenty of action - maybe more than previous books.
The jaguar alpha Otto really steps up his gave to get Sera as his mate, which results in a lot of peril for Sera and Caesar - but they have the whole we’re zoo group at their back

[Ashley C · Rating 5 out of 5]

I love this story. Sera has escaped her former pride. She meets her meets her mate Caesar. Her old alpha is dangerous. He wants Sera back at all cost. I love how Caesar, his pride and the zoo come together to protect family. Caesar’s and Sera’s story is awesome. I love this series, I cannot wait to read more.

[Shelley Chastagner · Rating 5 out of 5]

I was delighted to finally have Caesar and Sera's story. There are lots of sweet moments, but there is a ton of action and plenty of bad guys to deal with before they can relax. I loved that, once again, the entire park bands together to protect one of their own.
Highly recommended author and series

[Michelle Graves · Rating 5 out of 5]

Damn tank is sooooo awesome!! This psych thinks he has a rt 2 just says who he will mate with whether they like it or not. Caesar finally finds his mate but alot of baggage with her that she never wanted. But he will do everything he can 2 keep her safe. But when things hit a snag, what will happen then? Things got a little dicy but hopefully things can work itself out. That was really good!!

[Renee · Rating 4 out of 5]

Loved the end of this plot but can't wait for more!

I love series that are so interwoven! Every few books we get a continuation of a storyline and it makes me giddy. As these are interconnected, you really need to start from the beginning.
Spiciness wasn't very much so if you don't mind a little, then this book is for you.

[sharon e hochstetler · Rating 5 out of 5]

What a great end to the Otto Saga. He was deranged.

I !I've that Sera was magician with coffee and creamers!!! I know she makes and bakes other goodies but coffee is my favorite. Ceasar and his sons were so nice to Sera. They all considered each other family. No questions asked. The Stallions need to resolve their own nutcase now. Good battle at the end. Good read.

[Nadine · Rating 5 out of 5]

Awesome book

This is book 23 in this series. Besides a very hea, there's a lot of action, fight scenes, lots of drama. This book will have you sitting on the edge of your seat. Definitely one of my favorite books in this series.

[Dede]

Finally!!

I really detest seeing the Alphas in these stories not mated. Now, Caesar has his own mate and she purrs and roars just as loud as him! I am so happy for their union and I look forward to more from this animal habitat, regardless of what breed of animal or human!

[Michelle M · Rating 5 out of 5]

Amazing as always

I love the book I have the whole series and I look forward to reading the next book keep up the great work

[Mary Kay Burns · Rating 5 out of 5]

Great Book

This book kept me turning the pages to see what would happen next. I love the Were Zoo series and highly recommend it