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Sandra Martin: Amazon KDP author data

Sandra Martin has 4 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #1), mostly in New, Used & Rental Textbooks, Studying & Workbooks, Education & Teaching.

4Books on Amazon
3Listed in 30 days
4.6Average rating
Median price$18.16
Price range (middle 50%)$13.31 – $21.49
Median reviews116
Total reviews1,075
New books (30 days)2
Breakout books (30 days)2

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Sandra Martin's best-ranked books

  1. HSPT Strategies and Practice, Second Edition: Prep Book with 3 Practice Tests + Comprehens book cover by Sandra Martin

    HSPT Strategies and Practice, Second Edition: Prep Book with 3 Practice Tests + Comprehensive Review + Practice + Strategies (Barron's Test Prep)

    by Sandra Martin

    • Price$21.99
    • Rating4.6
    • Reviews231

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  2. HSPT Strategies and Practice, Third Edition: Prep Book with 4 Practice Tests + Comprehensi book cover by Sandra Martin

    HSPT Strategies and Practice, Third Edition: Prep Book with 4 Practice Tests + Comprehensive Review + Practice + Strategies (Barron's Test Prep)

    by Sandra Martin

    • Price$14.99
    • Rating4.5
    • Reviews2
    • Published2026-10

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  3. HSPT Strategies and Practice, Third Edition: Prep Book with 4 Practice Tests + Comprehensi book cover by Sandra Martin

    HSPT Strategies and Practice, Third Edition: Prep Book with 4 Practice Tests + Comprehensive Review + Practice + Strategies (Barron's Test Prep)

    by Sandra Martin

    • Price$21.32
    • Rating4.5
    • Reviews2
    • Published2026-10

    View on Amazon · Full data on KDPTop

  4. Jasmins Erinnerung (German Edition) book cover by Sandra Martin

    Jasmins Erinnerung (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.4
    • Reviews909
    • Published2024-07

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  5. Strategies and Practice for the HSPT (Barron's Test Prep) book cover by Sandra Martin

    Strategies and Practice for the HSPT (Barron's Test Prep)

    by Sandra Martin

    • Price$8.27
    • Rating4.7
    • Reviews840
    • Published2018-02

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  6. Zeit der Beschützer – Joseph: Kings of Guardian, Buch Zwei (Kings of Guardian - German 2) book cover by Sandra Martin

    Zeit der Beschützer – Joseph: Kings of Guardian, Buch Zwei (Kings of Guardian - German 2) (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.6
    • Reviews756
    • Published2023-10

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  7. Schutz für Olivia (SFOA): Red Team – Stahlharte Beschützer (German Edition) book cover by Sandra Martin

    Schutz für Olivia (SFOA): Red Team – Stahlharte Beschützer (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.5
    • Reviews746
    • Published2024-08

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  8. Zeit der Beschützer – Jason (Kings of Guardian, Buch Vier) (Kings of Guardian - German 4) book cover by Sandra Martin

    Zeit der Beschützer – Jason (Kings of Guardian, Buch Vier) (Kings of Guardian - German 4) (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.5
    • Reviews736
    • Published2024-03

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  9. Zeit der Beschützer – Adam (Kings of Guardian - German 3) (German Edition) book cover by Sandra Martin

    Zeit der Beschützer – Adam (Kings of Guardian - German 3) (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.5
    • Reviews727
    • Published2024-02

    View on Amazon · Full data on KDPTop

  10. Vergebung für Violet (SFOA): Red Team – Stahlharte Beschützer (German Edition) book cover by Sandra Martin

    Vergebung für Violet (SFOA): Red Team – Stahlharte Beschützer (German Edition)

    by Sandra Martin

    • Price$0
    • Rating4.6
    • Reviews721
    • Published2024-09

    View on Amazon · Full data on KDPTop

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About this data

Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.