The long awaited 2nd book in Chris Bryant CCNA Success series for ICND. The Kindle version is just right to carry around and review topics on the go. CCNA Success: Chris Bryant's ICND2 Study Guide
well worth the few pounds / dollars. It's companion book is CCNA Success: Chris Bryant's ICND1 Study Guide
It's been great for using in conjunction with the UDEMY course Chris has.
A few minor typos, layout issues already sent on to author. The layout issues are mainly related to a small display format device (Kindle), and the nature of the subject where there are long lines of command output.
Even if you aren't sure you want to do the course, the guide shows you what is going on and the level of material you need to study. Get this first and see. The CCNA changed this year so Chris brought out an updated course text. As the CCNS isn't likely to change again for 3-5 years, a small investment now will last for a long time.