(Note: This review is for both Cascade and Torrent) 
 In short: Though I needed more depth than the River of Time series by Lisa T. Bergren was able to give me, I do actually recommend this series if you're looking for a fun, fast-paced read. 
 The River of Time series has received so much hype and positive reviews that I just had to jump on the bandwagon and read it too. And I can see why this series is so popular. The extremely fast pace, the non-stop action, the swoon-worthy boys men, the feisty and brave heroines - the River of Time series is Entertainment with a capital "E". At no point is there ever any scene that is boring and at no point is there ever any lull in the non-stop adventures of the Betarrini Family. 
 At times, however, I felt the series was actually a bit too fast-paced for me - and this was ultimately the major factor in every little problem I had with the series. Plot points could have been better developed, characters and character relationships could have been further explored, and the time travel aspect could have been better explained, if only the series had slowed up the pace a bit more and included these things. Action scene after action scene is really fun, but I needed some filler to fully flesh out the story. And I really needed to know why Gabi and fam thought it was okay to completely mess with world history. 
 Something that really bothered me about the series, which I believe stemmed from the extremely fast pacing and not enough time spent developing the characters, is that Gabi and Lia kill A LOT of people and feel no remorse for it. We see them experiencing some grief after their first human kills in Waterfall, and then NOTHING in Cascade and Torrent. I realize that they're in a war situation and killing in defense is inevitable and I'm not asking for an all out Angst Fest here, but I needed for these young girls who grew up in the 21st century to feel something about these countless people they were killing, especially in a series where there are several passages where Gabi reflects on the value of human life. And though this has nothing to do with this series being considered Christian Fiction - because if you are a GOOD person, you will feel remorse for killing someone no matter what your religion - I was kind of under the impression that God wasn't down with killing humans. 
 Am I taking this series too seriously? Probably. But if that isn't an indication that what is supposed to be a light, fun read isn't the type of read for me, then I don't know what is. I needed more depth than the River of Time series was able to give me. This all being said however, I do actually recommend this series. All my complaints are obviously highly subjective and I think the vast majority of people would actually really enjoy spending an action-filled time with a cast of fun characters in Lisa T. Bergren's River of Time series.