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David Seidl: Amazon KDP author data

David Seidl has 43 books on Amazon, 14 of them on a best-seller list in the last 30 days (best rank #1), mostly in CompTIA, Security, Certification.

43Books on Amazon
14Listed in 30 days
4.6Average rating
Median price$38.68
Price range (middle 50%)$26.28 – $59.63
Median reviews109
Total reviews10,350
New books (30 days)6
Breakout books (30 days)5

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What stands out

  • 6 new books in the last 30 days, 5 of them broke into a Best Sellers list.

David Seidl's best-ranked books

  1. CompTIA Security+ Certification Kit: Exam SY0-701 (Sybex Study Guide) book cover by David Seidl

    CompTIA Security+ Certification Kit: Exam SY0-701 (Sybex Study Guide)

    by David Seidl

    • Price$41.83
    • Rating4.7
    • Reviews819
    • Published2024-01

    View on Amazon · Full data on KDPTop

  2. CompTIA Security+ Study Guide with over 500 Practice Test Questions: Exam SY0-701 (9th Edi book cover by David Seidl

    CompTIA Security+ Study Guide with over 500 Practice Test Questions: Exam SY0-701 (9th Edition)

    by David Seidl

    • Price$29.59
    • Rating4.6
    • Reviews366
    • Published2024-09

    View on Amazon · Full data on KDPTop

  3. CompTIA CySA+ Certification Kit: Exam CS0-004 (Sybex Study Guide) book cover by David Seidl

    CompTIA CySA+ Certification Kit: Exam CS0-004 (Sybex Study Guide)

    by David Seidl

    • Price$75.15
    • Rating4.6
    • Reviews3
    • Published2026-08

    View on Amazon · Full data on KDPTop

  4. CompTIA CySA+ Study Guide: Exam CS0-004 (Sybex Study Guide) book cover by David Seidl

    CompTIA CySA+ Study Guide: Exam CS0-004 (Sybex Study Guide)

    by David Seidl

    • Price$41.28
    • Rating3.3
    • Reviews7
    • Published2026-08

    View on Amazon · Full data on KDPTop

  5. CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition book cover by David Seidl

    CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition

    by David Seidl

    • Price$21.69
    • Rating4.7
    • Reviews276
    • Published2024-01

    View on Amazon · Full data on KDPTop

  6. CompTIA Security+ Practice Tests: Exam SY0-701 (Sybex Study Guide) book cover by David Seidl

    CompTIA Security+ Practice Tests: Exam SY0-701 (Sybex Study Guide)

    by David Seidl

    • Price$27
    • Rating4.6
    • Reviews99
    • Published2023-12

    View on Amazon · Full data on KDPTop

  7. CompTIA CySA+ Certification Kit: Exam CS0-003 book cover by David Seidl

    CompTIA CySA+ Certification Kit: Exam CS0-003

    by David Seidl

    • Price$52.95
    • Rating4.8
    • Reviews195
    • Published2023-08

    View on Amazon · Full data on KDPTop

  8. CompTIA Security+ Study Guide: Exam SY0-801 (Sybex Study Guide) book cover by David Seidl

    CompTIA Security+ Study Guide: Exam SY0-801 (Sybex Study Guide)

    by David Seidl

    • Price$60
    • Reviews-
    • Published2027-01

    View on Amazon · Full data on KDPTop

  9. CompTIA Security+ Practice Tests: Exam SY0-701 (Sybex Study Guide) book cover by David Seidl

    CompTIA Security+ Practice Tests: Exam SY0-701 (Sybex Study Guide)

    by David Seidl

    • Price$26.04
    • Rating4.6
    • Reviews99

    View on Amazon · Full data on KDPTop

  10. CompTIA CySA+ Practice Tests: Exam CS0-003 (Sybex Study Guide) book cover by David Seidl

    CompTIA CySA+ Practice Tests: Exam CS0-003 (Sybex Study Guide)

    by David Seidl

    • Price$25.24
    • Rating4.5
    • Reviews62
    • Published2023-08

    View on Amazon · Full data on KDPTop

Main categories

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.