Diib vs Book Detective (formerly What is that Books?)
Dive into the comparison of Diib vs Book Detective (formerly What is that Books?) and discover which AI Search Engine tool stands out. We examine alternatives, upvotes, features, reviews, pricing, and beyond.
In a comparison between Diib and Book Detective (formerly What is that Books?), which one comes out on top?
When we compare Diib and Book Detective (formerly What is that Books?), two exceptional search engine tools powered by artificial intelligence, and place them side by side, several key similarities and differences come to light. Interestingly, both tools have managed to secure the same number of upvotes. Be a part of the decision-making process. Your vote could determine the winner.
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Diib

What is Diib?
Diib is an SEO and business growth platform that helps small and mid-sized businesses improve their online presence. It analyzes your website, competitors, and industry data to deliver a personalized growth plan. The platform tracks SEO keywords, backlinks, social media performance, and website health to provide actionable insights.
Diib's Answer Engine works continuously to identify opportunities and alerts you to issues like traffic drops or security problems. It supports integration with Google Analytics and offers easy-to-follow recommendations even for users without SEO experience. With over 500,000 users worldwide, Diib aims to simplify digital marketing and help businesses increase traffic, improve rankings, and enhance visitor experience.
Book Detective (formerly What is that Books?)

What is Book Detective (formerly What is that Books?)?
Book Detective is an AI book search engine that finds titles from vague plot memories, character details, or mood descriptions you type in chat. It started as an experimental tool called What is that Book on Joelbooks and now runs as a custom GPT in the OpenAI GPT Store with a curated dataset of 10,000+ titles beyond ChatGPT's training cutoff.
Keyword book finders choke on fuzzy prompts like "fantasy with dragons and a clever heroine." Book Detective combines GPT-4 with Joelbooks' editorial dataset of fresh fiction and nonfiction excerpts, updated weekly with upcoming releases ChatGPT alone cannot see. The trade-off is that it lives inside ChatGPT rather than as a standalone website, so you need a ChatGPT account to use the current version.
Readers who forgot a title but remember scenes use Book Detective to match fragmented descriptions against both the LLM and Joelbooks' quality-filtered catalog. Authors can submit books directly to the dataset. The original whatbook URL on Joelbooks now 404s; Book Detective is the documented successor as of May 2024.
Diib Upvotes
Book Detective (formerly What is that Books?) Upvotes
Diib Top Features
🚀 Custom Growth Plan: Get daily alerts and objectives tailored to your website's needs to boost traffic and rankings.
🔍 Keyword & Backlink Tracking: Monitor your important keywords and backlinks to protect and improve your SEO.
📊 Competitor Analysis: Compare your website’s performance and keyword rankings against up to 6 competitors.
📈 Website Health Monitoring: Receive daily health scores and alerts for traffic drops, security issues, and algorithm changes.
📱 Social Media Insights: Sync your social accounts to get data-driven recommendations for growing your social presence.
Book Detective (formerly What is that Books?) Top Features
Searches books from natural-language descriptions like plot twists, characters, or moods
Combines GPT-4 with a Joelbooks dataset of 10,000+ curated fiction and nonfiction titles
Database updated weekly with fresh and upcoming releases outside ChatGPT's knowledge cutoff
Available as Book Detective in the official OpenAI GPT Store since May 2024
Authors can submit books directly to the searchable AI dataset
Outperformed BookAbout and Findyournextbook in Joelbooks' early comparison tests
Diib Category
- Search Engine
Book Detective (formerly What is that Books?) Category
- Search Engine
Diib Pricing Type
- Freemium
Book Detective (formerly What is that Books?) Pricing Type
- Free
