// Comparison

A Bug Hunter's Diary vs Pentesting Azure Applications: Which Should You Read?

Two cybersecurity books on Offensive, compared honestly: who each is for, what each does best, and which to read first.

Intermediate

4/52011

A Guided Tour Through the Wilds of Software Security

Tobias Klein

Tobias Klein walks through seven real vulnerabilities he found and exploited, in the form of personal lab notes, what he tried, what failed, and what eventually shipped to vendors.

Intermediate

3/52018

Pentesting Azure Applications

The Definitive Guide to Testing and Securing Deployments

Matt Burrough

Matt Burrough on attacker behaviour against Azure tenants: identity, storage, VMs, key material handling, and the recon paths that work against real subscriptions.

Read this if

Vulnerability researchers and aspiring bug hunters who want to feel what real research actually feels like. Klein's lab-notes format makes failure visible, which is the part the typical write-up genre hides.

Cloud pentesters whose scope includes Azure subscriptions. Burrough covers identity (Entra ID), storage account abuse, VM-level recon, key material handling, and the role-based access patterns that drive real Azure post-exploitation.

Skip this if

Readers wanting modern web/API bug hunting. The book is binary-focused (browser, kernel, audio drivers) and from 2011; for current bug bounty workflow, read Real-World Bug Hunting and Bug Bounty Bootcamp instead.

Readers focused on AWS or GCP, or anyone wanting current Azure tradecraft. The book pre-dates the current AAD-now-Entra-ID rebrand and several major service updates; treat it as foundational, not current.

Key takeaways

Real vulnerability research is mostly hypothesis-and-failure; Klein's diary format teaches the resilience the field demands.
Sample selection (which target, which feature, which bug class) is the highest-leverage choice; the book makes this explicit in a way most write-ups skip.
Disclosure tradecraft (vendor coordination, patch tracking, advisory writing) is part of the work; the chapters on it are the calmest treatment in print.

Azure attack patterns center on identity and roles, not network-level vulnerabilities; the book's framing reflects that.
Storage account misconfigurations remain one of the most common Azure findings; the book's coverage of access-key abuse is still relevant.
Cloud pentest reporting differs meaningfully from network pentest reporting; the book's deliverable templates are useful starting points.

How they compare

We rate A Bug Hunter's Diary higher (4/5 against 3/5 for Pentesting Azure Applications). For most readers, that means A Bug Hunter's Diary is the primary pick and Pentesting Azure Applications is a useful follow-up.

Both books target intermediate-level readers, so the choice is about topic, not difficulty.

A Bug Hunter's Diary and Pentesting Azure Applications both cover Offensive, so reading them in sequence reinforces the same material from different angles.

Keep reading

A Bug Hunter's Diary

→ Alternatives to A Bug Hunter's Diary → What to read after A Bug Hunter's Diary