"Todd grippingly conjures a what-if time-travel scenario that’s unusually believable.” — Kirkus

"As the main characters carry out their exciting mission and remake history, readers will find it intensely satisfying, and the cliffhanger ending promises new thrills to come.” — Kirkus

"A compelling premise that’s strengthened by solid scientific explanations, well-rounded characters, and nail-biting suspense.” — Kirkus

"★★★★★ Time Tunnel: The Twin Towers is a wonderful piece of work with great actions scenes and a fantastic storyline that would be enjoyed by a wide audience."— Manhattan Book Review

"★★★★★ The integration of the time travel storyline with the real events that happened on that day are seamless. If I didn’t know better, I would think this could have really happened."— Manhattan Book Review

"★★★★★ (4.5) The Twin Towers is a compelling, fascinating read that ends with the reader anxious for the sequel.” — San Francisco Book Review

“★★★★★ (4.5)...the reader is kept hooked to the very end where there’s a great cliffhanger." — San Francisco Book Review

"★★★★★ Richard Todd does a great job of hooking the reader and making them commiserate with the characters who are very well developed and multidimensional. If you like time travel, then Richard Todd's Time Tunnel series is definitely the book for you." — Seattle Book Review

"★★★★★ Twin Towers is recommended to those who enjoy pure action with romance, aliens, vengeance, and having the ability to change the past. In this first book of the Time Tunnel series, we are left with a cliffhanger, so hurry and finish this one to continue on to Time Tunnel: The Empire.” — Tulsa Book Review

"★★★★★ Time Tunnel: The Empire was a crazy good adventure that I would have never expected from this sci-fi style book. It is a must-read that I could hardly put down.” — Manhattan Book Review

“★★★★...eerie similarities to our current political climate cannot be denied….This book also ends on a great cliffhanger, leaving the reader wanting much more.”  — San Francisco Book Review

"In this second installment of a series, Todd (Time Tunnel: The Twin Towers, 2019) continues exploring the intriguing possibilities of time travel, backing up his speculations with well-researched history and believable science. Though adept at setting up exciting, tense confrontations, the author is also a thoughtful writer, and his characters are appropriately vulnerable, though Padma is hailed as the messiah of Lakota prophecy and Kyle has modern weaponry. Todd’s Lakota camp and the town of Deadwood come vividly alive with well-chosen, telling details such as the checkerboard that sits atop a general store’s cracker barrel. The cliffhanger ending will leave readers eager for the next volume.”  — Kirkus

"★★★★★ Just like the first novel in the series The Twin Towers, The Empire is full of action, intrigue, and suspense. Richard Todd does a fantastic job of retelling historical events, which are brilliantly researched.” — Seattle Book Review

"★★★★★ Relationships are tested in this story; the only way to know how you truly feel about someone is to throw them in a situation together for which they are totally unprepared. The reader is able to delve deeper into the feelings of the characters and grasp a better understanding for the motivation of their actions. As in Twin Towers, there is action galore, and The Empire includes another story from history that originally ended badly, but now occurs in a way we would have liked for it to have played out. The ending was a complete shock, with another phase in the Time Tunnel series coming at a later date.” — Tulsa Book Review