Another way is to connect your iPhone to a computer and use iTunes. Once connected, select your device, go to the Books section, and then you can manage and remove the fanfic epubs/ibooks you don't want anymore.
You can try deleting them directly from your iPhone's Books app. Just find the fanfic epubs/ibooks you want to remove, swipe left or long-press, and then select the delete option.
First, open the Settings app on your iPhone. Then, go to General > iPhone Storage. Look for the Books app and click on it. From there, you should be able to see the fanfic epubs/ibooks and select the ones you want to remove.
Chapter 1, "I'm Not Interested in Uncultured Men", is the clearest early answer because it turns Xiang Hao's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li, I'm warning you, don't set your sights on Yinwan anymore,...
Chapter 340, "Seclusion, Growing Yu Generation, Family Banquet, Rapid Development", is the clearest early answer because it turns Star's situation into a concrete plot event. It opens with But unexpectedly, at this very moment, the solemn and sacred... and closes on The last time Nong Ying carried the Second Prince, she wasn't paying....
Chapter 277, "Jiang Yan Really Has a Youthful Vibe", is the clearest early answer because it turns Has's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After reviewing that document, Zhao Lang's brows knitted together...
Chapter 16, "He Actually Fell Asleep", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. The setup is Just as the words fell, Jiang Shixu swiftly cast his eyes downward., but the pressure keeps building through His eyelashes were very long;
Chapter 327, "The Beast Tide Battle, the Wolf King and the Trump Card, White Dew Gu's Desperate Situation (4)", is the clearest early answer because the buildup finally cashes out in a real clash. It opens with Unveil the tarp, prepare the Divine Machine Crossbow!" Xia Hong's... and closes on Fwoom… Fwoom… Ultimately, the bowstring couldn't withstand the force....
Chapter 236, "The Murderer Returns to the Scene of the Crime Theory", is the clearest early answer because it pushes Chasing Wind Youth into a new phase or setting.
Chapter 219, "Five Thousand Jin??!!", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Qi Tianyu was somewhat freaking out.
Chapter 22, "Number 7203", is the clearest early answer because it turns Space Administration's situation into a concrete plot event. The chapter gives readers a real answer by opening on Hearing this, Su Yinwan looked at Shang Shaojing with a face full of...
Chapter 331, "Zhu Shun and Huang Tianxi, the 3rd Year Cold Yuan Banquet of Great Xia, and Xia Yuzong (Part 5)", is the clearest early answer because it turns Yuan Cheng's situation into a concrete plot event. It opens with The children immediately lowered their heads in fear, Huang Tianxi... and closes on The Seven Departments in the Outer City East, South, West, and North....
Chapter 401, ""Youth Trainee" Premieres!", is the clearest early answer because it turns Xi Yang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with With Huo Xuan's help, Jiang Li quickly got rid of the fans and was...