This document lists typos and mistakes in the textbooks "Introduction to Linear and Matrix Algebra" and "Advanced Linear and Matrix Algebra" by Nathaniel Johnston.

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INTRODUCTION TO LINEAR AND MATRIX ALGEBRA
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- Theorem 1.4.1: the proof references Theorem 1.3.2. While this is is technically correct, a better/clearer reference would have been Theorem 1.3.5. (thanks to Michael Mott)
- Exercise 2.1.6(a): the solution in the back of the book is (-30, 3, 60, 7, 0) + z(-51, 3, 106, 5, 6)/6, which should be (-30, 3, 60, 7, 0) + z(-51, 2, 106, 5, 6)/6. (thanks to Michael Mott)
- Exercise 2.5.7 has two "b" parts. The second one should be part "c". (thanks to Dominic Haidar)
- Exercise 3.2.5 has two "a" parts. The second one should be part "c". (thanks to Piko Mone on Youtube)
- Exercise 3.4.6 has parts (f)-(j) mislabeled. They should be labeled (e)-(i). (thanks to Keagan Finnigan-MacEachern)

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ADVANCED LINEAR AND MATRIX ALGEBRA
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- None yet.